Patent ID: 8666617

Claim:
A gear shift control unit for an automatic transmission, comprising: an automatic shift mode in which a gear shift control is executed on the basis of a traveling state of a vehicle, the automatic shift mode being implemented by a processor; a temporary manual shift mode in which, when the automatic shift mode is executed, the gear shift control is temporarily executed with a manual shift operation unit in response to an operation of a driver until a predetermined cancellation condition is satisfied, and the automatic shift mode is automatically returned when the predetermined cancellation condition is satisfied; and a vehicle traveling state determination unit that determines a traveling state of the vehicle, wherein the temporary manual shift mode includes a manual assist control unit that automatically shifts down a transmission gear stage when the vehicle traveling state determination unit determines at least either one of a sudden return of an accelerator pedal from an accelerated state of the vehicle and sudden deceleration by an operation of the foot brake, on the basis of a parameter for detecting the traveling state of the vehicle.