This work proposes an approach to the translation of humour based on the notions of context, prototype and frame as defined in Fillmore's Frame Semantics. The author attempts to elaborate a model based on the mental frames or knowledge structures which are activated by the reader of a text and the procedures used by the author to manipulate these frames and create a humorous effect. Such a model is used to analyse a number of examples from David Lodge's Small World and its Spanish translation El mundo es un pañuelo by Esteban Riambau Sauri.