Provided is an intermediate member which is arranged between a motor housing (4) and a transmission case (2) and which has multiple motor housing supporting point positions (A) and transmission case supporting point positions (B). The intermediate member is coupled to the motor housing (4) at the motor housing supporting point positions (A). The transmission case supporting point positions (B) are each arranged in an angular region formed between a motor housing supporting line (C) and a motor housing supporting center line (D) which is the center between the motor housing supporting line (C) and another motor housing supporting line (C) adjacent thereto.