DRIVE APPARATUS

A drive apparatus includes: an electric motor (15); a drive member (21); a transmission mechanism (17) through which the electric motor and the drive member are connected to each other; a rotation sensor (53) that detects the rotational position of the electric motor; a starting position setting unit (50) that sets the rotational position which is detected in a motor lock state in which the rotation of the electric motor is limited, as a starting position corresponding to a mechanical lock state of the drive member; a voltage sensor (54) that detects the voltage (V) of an electric power source which supplies electric power to the electric motor (15); and a starting position correcting unit (50) that corrects the set starting position by an amount of correction which increases as the detected voltage increases.