An electric actuator includes a motor, an electricity storing body, a manual operating unit, a switch and a resetting unit. In a state wherein a controlled element has arrived at a first opening and a supply of power to the motor from the electricity storing body is cut off, the motor and the controlled element are in a non-linked state only while a button is pushed. The switch keeps a supply path of electric power open when the button has been pressed once. The resetting unit closes the switch at a point in time that the controlled element that is driven by the motor arrives at a specific second opening at a time of restoration of the external power supply in a state wherein the non-linked state of the motor and the controlled element by the button has been undone.