A drive apparatus for a vehicle, comprising: a transmission including an input shaft inputting a driving force of an engine, an output shaft outputting the driving force of the engine that is changed at the transmission to driving wheels (Wfl, Wfr), and a transmission clutch (52a, 52b, 52c) that includes an input element (43b, 45b, 53b, 53c) connected to the input shaft to rotate, an output element (53a, 46a, 47a, 48a, 153a) connected to the output shaft to rotate, and an engagement element (54a, 54b, 54c, 154a) connecting the input element (43b, 45b, 53b, 53c) and the output element (53a, 46a, 47a, 48a) in engageable and disengageable manner, the input element (43b, 45b, 53b, 53c) and the output element (53a, 46a, 47a, 48a) being selectively engaged and disengaged relative to each other; a transmission drive mechanism driving the engagement element (54a, 54b, 54c) of the transmission; a clutch selectively engaging and disengaging between an output shaft (11 a) of the engine and the input shaft of the transmission to form an engagement state and a disengagement state; a clutch drive mechanism driving the clutch; a motor generator configured to output a driving force to the output shaft of the transmission; a clutch/motor torque increase portion (66, S104, S108) controlling the transmission clutch (52a, 52b, 52c) to be engaged to increase a clutch torque of the clutch and increase a motor torque of the motor generator by an amount corresponding to the increase of the clutch torque in a case where an engine start request serving as a request for starting the engine is obtained during a motor driving of the vehicle that is achieved by the driving force of the motor generator; and an engine combustion start portion (66, S116) starting a combustion of the engine by a combustion starting member (11 b) in a case where a rotation speed of the engine reaches a predetermined value; the drive apparatus being characterized in: a transmission drive mechanism biasing portion (66, S112) driving the transmission drive mechanism to bias the engagement element (54a, 54b, 54c) of the transmission clutch (52a, 52b, 52c) that is engaged in a release direction in a case where the clutch torque reaches an engine start request torque for starting the engine. a transmission including an input shaft inputting a driving force of an engine, an output shaft outputting the driving force of the engine that is changed at the transmission to driving wheels (Wfl, Wfr), and a transmission clutch (52a, 52b, 52c) that includes an input element (43b, 45b, 53b, 53c) connected to the input shaft to rotate, an output element (53a, 46a, 47a, 48a, 153a) connected to the output shaft to rotate, and an engagement element (54a, 54b, 54c, 154a) connecting the input element (43b, 45b, 53b, 53c) and the output element (53a, 46a, 47a, 48a) in engageable and disengageable manner, the input element (43b, 45b, 53b, 53c) and the output element (53a, 46a, 47a, 48a) being selectively engaged and disengaged relative to each other; a transmission drive mechanism driving the engagement element (54a, 54b, 54c) of the transmission; a clutch selectively engaging and disengaging between an output shaft (11 a) of the engine and the input shaft of the transmission to form an engagement state and a disengagement state; a clutch drive mechanism driving the clutch; a motor generator configured to output a driving force to the output shaft of the transmission; a clutch/motor torque increase portion (66, S104, S108) controlling the transmission clutch (52a, 52b, 52c) to be engaged to increase a clutch torque of the clutch and increase a motor torque of the motor generator by an amount corresponding to the increase of the clutch torque in a case where an engine start request serving as a request for starting the engine is obtained during a motor driving of the vehicle that is achieved by the driving force of the motor generator; and an engine combustion start portion (66, S116) starting a combustion of the engine by a combustion starting member (11 b) in a case where a rotation speed of the engine reaches a predetermined value; a transmission drive mechanism biasing portion (66, S112) driving the transmission drive mechanism to bias the engagement element (54a, 54b, 54c) of the transmission clutch (52a, 52b, 52c) that is engaged in a release direction in a case where the clutch torque reaches an engine start request torque for starting the engine.