The purpose of the present invention is to solve the problem of discomfort imparted to the driver due to an engine rotation speed trajectory control, which does not generate change corresponding to a gear shift. The starting clutch control device is provided with a starting clutch control means for controlling the transmission torque capacity of the starting clutches in order for a rotation trajectory of the power source will develop as desired in a low rotation speed range in which the transmission torque capacity control of the starting clutch is necessary. When shifting of the automatic transmission occurs during the transmission torque capacity control by that means, the starting clutch control means is configured to cause the transmission torque capacity of the starting clutch to change, when shifting of the automatic transmission occurs during the transmission torque capacity control by that means, in a direction in which the change in the rotation trajectory will occur corresponding to that shift.