To obtain a powered door which enables the smooth behavior of a door body during braking.

This powered door for opening/closing a door opening by driving the door body through the use of power of a motor (510) via a power transmission mechanism includes: a regenerating brake circuit (514) for a motor, capable of being turned on/off; a worm speed reducing mechanism (530) which exists in the power transmission mechanism by positioning a worm gear (532) on the side of the motor and positioning a worm wheel (534) on the side of the door body, and which can reversibly transmit the power between the worm gear and the worm wheel (534); a clutch (520) which can be turned on/off and which connects a revolving shaft (512) of the motor and the worm gear (532) of the worm speed reducing mechanism together; and a control means for time-series controlling a combination of the on/off state of the regenerating brake circuit (514) and that of the clutch (520) when the door body is braked.