A hybrid vehicle drive unit that includes an intermediate shaft, a starting clutch and motor generator that includes a stator that is fixed to an interior portion of a motor casing that is attached to a housing of the transmission; a rotor support member that is coupled to the clutch drum and has an inner end portion that is rotatably supported by an end wall of the motor casing and a rotor support portion that is fitted to an outer perimeter face of the clutch drum in an axial direction such that there is play between the rotor support portion and the outer perimeter face; and a rotor that is held by the rotor support portion of the rotor support member and is disposed such that an outer perimeter face of the rotor faces an inner perimeter face of the stator.