The thesis explores the representation and role of the teacher on selected novels of Croatian children's literature over a period of one century. Starting from studies that consider the above topic (Hranjec, 2009. Winter, 2011, Riman, 2014, Bošković and Odţa 2015.), the paper presents examples of typologically diverse teacher characters that played a significant role in portraying children's characters and contributed to the comprehensiveness of the image of childhood and certain periods in the history of Croatian children's literature. In novels that thematize distant narrative time (Jagoda Truhelka, Tugomila), the character of the teacher is idealized, as are the characters of the teacher in Mate Lovrak's novels from the 1930s. During the middle of the twentieth century, the character of the teacher experienced changes in children's prose, thanks to the Ivan Kusan's novels (You lie, Melita and Homework) who approached the figure of the teacher as an ordinary man with flaws and virtues. The character of the teacher ceases to be a role model, but he still supports the children's characters (protector, friend, interlocutor). Contemporary novels show the state of the school system through humor and irony, further emphasizing that the teacher is also an ordinary man who can make mistakes, misjudge, be cold, but also affectionate, cheerful and creative. In the centuries-old period, the portrayal of a teacher in a children's novel changed, from idealized, through protective (Nada Iveljic, Silent inhabitants of the facade), friendly (Tihomir Horvat, The Secret of the Upper Town), to humorous and cheerful as we find, for example, in the novels of Sanja Polak.