Transmedia storytelling, are stories that develop across multiple media platforms, where each text makes a contribution to a much larger story. And each text, be it movie, comic, videogame, etc., has its own fabula structure.However, in the case of transmedia storytelling, in addition to the fabula of each text, the reader can try to build a much more extensive fabula, which includes all the texts that make up the transmedia storytelling, which we will call transmedia fabula.We can find two types of transmedia storytelling, those that were designed, in which case the narrative contributions of each text are determined from the beginning. Where the fabula of each film, or videogame can be identified, but also, a transmedia fabula structure that the reader can formulate from the union of all the texts together.The other cases are transmedia storytelling that were not born as such, and that were converted into transmedia over time, as new texts were added. Although the reader can formulate a fabula for each of them, how this type of narrative can continue to expand, the general fabula of the entire story may not be completed, or the reader may have greater difficulty to generate an idea of the transmedia fabula.Transmedia fabula will depend on the encyclopedia and the competencies of the reader, because the more experience with the different texts the reader has, the greater resources he will have to formulate his idea of a fabula, both of each text, like a transmedia fabula.