The paper presents and interprets contemporary field notes of intangible cultural heritage in the area of Posušje employing a multidisciplinary approach. The field notes were recorded from the beginning of 2010 until 2020. The interpretation is complemented by using relevant literary-theoretical literature. Introduction explains the dissertation's structure, materials used, methodology, aim of research and hypotheses. Introduction is followed by the chapter that deals with the historical and geographical characteristics of Posušje area. The first written mention of Posušje dates from 1378 in the description of the meeting convened by Margareta, the widow of the Croatian feudal lord Ivan Nelipić from Sinj, who owned Posušje. It is assumed that Posušje inherited its name from the droughts that marked the Posušje region. The long period of Ottoman rule left a deep mark on the life and the culture of the whole area. The help of the priests at the time of Ottoman rule was crucial for whole Christian community. Their commitment to the community continued through later periods. Today’s life of Posušje people is also closely connected to the religion and the church. The multidisciplinary analysis begins with the chapter on customs throughout the year. In the period of Advent, inhabitants of Posušje worship the holidays of St. Barbara, St. Nicholas, the Immaculate Conception of the Blessed Virgin Mary, St. Lucy and St. Thomas in a special way. The days of Materice and Očići are associated with giving cina so they took the names Ženska (Female) and Muška (Male) cina. Recently the custom of advent wreath is more and more existent in the homes. In the period of preparation for Christmas, Christmas Eve is the day with which most folk customs are associated. The day of Christmas is characterized by going to the Holy Masses, congratulating each other, exchanging presents, praying, eating Christmas meal and being with loved ones. Christmas is followed by the Christmas Octave (Božićna osmina), that celebrates the days of the saints: Stephen the First Martyr and John the Evangelist, then the Innocent Children and the St. Sylvester' Day. The New Year is the last day of the Christmas Octave. With the feast of the Holy Three Kings ends the Christmas period and then all Christmas decorations are removed. Candlemas is celebrated forty days after the Christmas in memory of the Presentation of Jesus Christ in the Temple in Jerusalem. It is also called Kalandora. This holiday is associated with the divinations about the weather and fertility of the year. Carnival customs took an important place in the past among adults. The scenes of grandmother and grandfather as well as the scenes of bride and groom that were seen very often in the past, are no longer present. These scenes have elements of folklore theatre. Nowadays, children disguise themselves as characters of their favourite heroes, princesses or animals. They go from house to house and receive money and sweets as gifts. With the holiday of Ash Wednesday begins the period of Lent. In this period of preparation for the greatest Christian holiday there are no festivities or weddings. In the past women often wore black clothes and did not cut their hair. The narrators testify that people often abstained from eating meat and dairy products during the period of Lent, and on Holy Wednesday, Annunciation and Holy Days they would only drink water and eat bread. Palm Sunday presents the introduction to the Holy Week. The Paschal Triduum begins with the Holy Thursday which is associated with the presentation of Keeping the Tomb of Christ. This custom is no longer present in the parish of Posušje. The day of Holy Friday was marked as a day for helping people in need, and Holy Saturday is marked by the preparation for the Easter. In the evening people go to the Easter Vigil where the priest blesses the prepared food. Easter marks the beginning of a new, happier period for Christians when Jesus's victory over death is celebrated. Other customs throughout the year refer to the Feast of Saint George, the Feast of Saint Mark the Evangelist, the Ascension, the Feast of Corpus Christi, the Feast of Saint Anthony, the Feast of Saint John the Baptist, the Feast of Saint Elijah, The Assumption of Mary into Heaven, the Feast of Saint Rocco, All Saints' Day and All Souls' Day. A great number of customs and divinations related to mentioned feasts do not belong to the living tradition of the Posušje area. The chapter on prayer oral songs brings an analysis of about forty originally recorded prayer songs and their variations. Prayers are classified into: morning prayers; community prayers (family and relatives) afternoon and evening prayers; evening (before going to sleep) prayers; commemorative prayers; prayers dedicated to the Blessed Virgin Mary and prayers dedicated to saints. A comparative approach shows that the verses of originally recorded prayer songs in Posušje appear in Croatian records of prayers in other areas of Bosnia and Herzegovina. There are numerous variations and interleaving of verses of different prayers on the studied area, which affirms the rich transmission of the oral folk prayers. The oral folk transmission of prayers is much less present nowadays. The motif and thematic world of the traditions of the Posušje region is diverse and rich. Based on the classification of Marko Dragić, traditions are classified into: historical, etiological, eschatological, mythical, demonological and stories from everyday life. Besides the traditions associated to the Ottoman rule, the most common are mythical and demonological themes. The contents of the traditions intertwine, so some of them could be classified into several different groups. That can especially be seen with historical and etiological traditions that are largely related to the theme of the Ottoman occupation. The historical traditions in the paper are related to stećci and the mentioned period of Ottoman occupation. Etiological traditions mostly originated on the historical level and on the basis of stories from everyday life. Eschatological traditions refer to the appearance of murdered new-borns and adults. The only mythical beings of traditions recorded at the area of Posušje are fairies. In the folk tradition fairies are characterized as beings that rarely do harm to people. They would do so if someone discovered their secret that they have a horse, donkey or goat hoof. They would also revenge to those people who discover others where they took them. To those who invoke them, they caused insanity. However, if someone did a favour to them, they would have always given that person a reward. Demonological beings also possess supernatural abilities. However, they always harm people in some way. These creatures are: witches, more, werewolf, devil and ominous birds. Stories from everyday life refer to: didactical stories about killing father, those that explain the causes of burying the dead after twenty-four hours have passed since death, the story about going to work in Dalmatia, story about the hero Sirovina from Rakitno and the story about three hunters. Main characters of legends recorded in the area of Posušje are Jesus Christ, Saint Peter and Saint Anthony. The paper also presents and interprets legends about the origin of Blidinje Lake which reflect the Old Testament motif of Sodom and Gomorrah. Compared to the customs that preceded the traditional wedding, the customs that precede contemporary weddings are significantly reduced. Considering wedding morning, day and evening, recently taken customs often overlap with the traditional ones. Therefore, in addition to frequently modified traditional customs such as welcoming wedding guests at home, aspersion, throwing an apple, toasting and giving presents, customs that have been adopted under the influence of various media such as the first wedding dance, cake-cutting and throwing the bridal bouquet appear in contemporary weddings. Ganga is the way of singing that is characteristic for the researched region. Although it is much less present today than it was in the last century, ganga is still considered to be an important part of the cultural tradition of Posušje area. The examples of gangas are classified according to the main motifs: about ganga and singing, ganga of love themes and other ganga that cover several different themes. The chapter on microstructures refers to proverbs and riddles. Proverbs were often used when one wanted to instruct or warn a certain way of behaving while riddles were used to entertain and to develop way of thinking. The paper presents sixty records of proverbs and fifty-two records of riddles classified alphabetically. In addition to the cattle raising and agriculture, inhabitants of Posušje in the past earned for their living by growing and selling tobacco. They also practiced traditional crafts and handicrafts. Carpenters, saddlers and coopers were engaged in wood processing. Blacksmiths made, sharpened and repaired items made of iron and steel. Stonemasonry or stone craft refers to craft of shaping rock. People used rock to build houses, farm buildings, draw-wells, drywells but also gravestones and crosses. The most common raw material in the production of textile handicrafts was wool. With the abandonment of cattle raising as the primary form of economy and the arrival of various factory materials, customs related to the manufacture of clothing and other items of wool were extinguished at the area of Posušje. Today, these items can more often be seen by elderly who keep them as a memory of past days. Conclusion of the dissertation presents the knowledge about the intangible cultural heritage of the area of Posušje, which is an integral and important part of the Croatian intangible cultural heritage. The paper ends with Resources and References. Key words: intangible cultural heritage, customs throughout the year, prayer oral songs, traditions, legends, wedding customs, gange, microstructures, economy, Posušje area.