Mass media are media of wide consumption and wide reach. The mass media have become the most widespread means of communication with the public institutions, institutions with other institutions and certain public with another public. Mass media are view through the window of the world. Today’s world is unthinkable without the media that provides countless information on daily basis. Term mass media is simultaneously used for communication forms, cultural formations and institutions. Final thesis consists, apart from the introduction and conclusion, of five chapters. Media, mass media, features, phenomena of mass media in world and in Croatia are mentioned in the first chapter. Mass media is listed in chronological order of the date of the invention or the date of usage in Croatia. The second chapter follows the history of press in Croatia from the 19th century, during national revival that had an important role in the keeping of Croatian language and journalism till the beginning of new millennium. Next chapter is about radio, the establishment of radio Zagreb and other local radiophonics until Homeland war and independent republic of Croatia. Third chapter is television, its invention and the beginnings of television in Croatia whilst in Yugoslavia then later as an independent republic of Croatia. Finally, the latest mass media is Internet. Internet had its beginning in Croatia during the Homeland war. The chapter describes its development and innovation until the end of the last century.