The invention relates to a drive device for a hybrid-drive motor vehicle, having an internal combustion engine (12), a variable-speed transmission (14), and an electric machine (32) connected downstream of the variable-speed transmission (14). According to the invention the electric machine (32) is arranged in the motor vehicle as an independent structural unit (16) and is connected by at least one connecting shaft (20, 46) to one of the shafts (38, 40) of the variable-speed transmission (14).