A transmission housing (2) including two housing elements (9) that can be positioned to press against each other and that in the assembled state define: a cavity (13); a shaft (6) projecting at least in part from the housing; a motion transmission mechanism (30) for transmitting motion to said shaft (6), the motion transmission mechanism (30) being housed at least in part inside the cavity (13) of the housing (2); and adhesive connection means (16) for connecting together housing elements (9) that are arranged in the zone where said housing elements (9) are pressed together and referred to as a join plane (10).The adhesive connection means (16) include a main channel (163) for receiving adhesive surrounding said cavity (13), said main channel (163) comprising a female element (1631) carried by a housing element (9) and a male element (1632) carried by the other housing element (9) with the male element (1632) being engaged at least in part in the female element (1631) in the assembled-together state of said housing elements (9).