One should recognize the type of texts he/she is reading and classify them into specific literary genres in order to acquire a thorough understanding of them. Since a literary genre is recognized according to its special characteristics and principles, it is impossible to study a text unless its type and genre are determined.This paper is an attempt to determine the types of four Persian folktales, includingSandbad Nameh, Bakhtiar Nameh, Hossein Kurd, and Malek Jamshid, the Spell of Asef, and the Spell of Crystal Bathroom. The theories developed by structuralist narratologists and particularly Todorov’s narratology and his views on the "mythological narratives” constitute the theoretical framework of the study.According to Todorov’s narratology, immediate causality, emphasis on characters' actions, absence of time, and lack of psychology are the major characteristics of mythological narratives. Citing some examples from the said folktales and comparing their characteristics with those enumerated by Todorov, the authors of this paper show that they can all be categorized into mythological narratives despite differences in theme, overall structure, linguistic characteristics and the fact that they belong to different eras. It goes without saying that the findings could encourage further studies on text typology and classification.