The subject of my final thesis is the translation of idioms in children's literature. The definition of children's literature, translation in general, as well as idioms as a translation problem are examined. Following some introductory remarks about children's literature, I refer to other authors to give different definitions of the genre and a description of its function and role. Furthermore, I deal with the translation of children's literature and its aspects that need to be taken into account in the process. I point out idioms as a translation problem, trying to give an explanation of what they are, describing the difficulties in identifying idioms and in translating them. Regarding the latter I refer to Mona Baker's and Rune Ingo's description of methods for translating idioms. I support all this with my own examples, as well as a short analysis of the idioms found in the Swedish original and the Croatian translation of the famous children's book Pippi Longstocking written by Astrid Lindgren. Although an overall conclusion could be that the topic Translation of Idiomatic Expressions in Children's Literature is still a largely unexplored area of research, Baker and Ingo's description of translation methods can be applied to all literary genres, including children's literature, and as such can serve as a good starting point for further research and interpretation of idiomatic expressions, as well as the translation of idioms in the context of children’s literature.