Described is a movement device (1) for a self-propelled lawn mower robot comprising a main wheel (2) which can be coupled to a power pick-up of a motor； at least one auxiliary wheel (3) which can be coupled to the main wheel (2) for receiving from it a mechanical power and coupling means (4) configured for securely constraining the at least one auxiliary wheel (3) to the main wheel (2), in such a way that the auxiliary wheel (3) is rotationally integral with the main wheel (2).
