The power transmission control device

A power transmission controlling apparatus of a vehicle includes a clutch (30) capable of connecting/disconnecting power transmission between an engine (10) and a motor/generator (20), and a torque converter (55) enabling power transmission between the engine (10) or/and the motor/generator (20) and an automatic transmission (50). When the engine (10) is started by motoring torque with engagement of the clutch (30) during rotation of the motor/generator (20), the power transmission controlling apparatus sets a torque compensation amount by the motor/generator (20) based on an estimated torque capacity of the clutch (30), and suppresses torque fluctuations on a power transmission path accompanying engagement of the clutch (30) by power of the motor/generator (20) containing the torque compensation amount. The power transmission controlling apparatus corrects the torque capacity or the torque compensation amount based on input torque of the torque converter (55).