The seat includes a back whose rear face is provided with a retractable table hinged thereto and including a strut having a first end pivotally mounted to the rear face of the back for selectively holding the table in a retracted position and in a deployed position. The table also has at least one cam secured to the rear face of the back and possessing a sliding path which co-operates resiliently with the strut, which strut has a second end slidably mounted relative to a guide secured to the table, the sliding path of the cam being curvilinear so as to oppose and enhance in succession the movement of the table from one of its two positions to the other.