An apparatus (1) for opening and closing a lid (lid body) of a vehicle includes a linearly-movable shaft (10) supported by a housing (90) such that the shaft (10) is linearly movable along, and nonrotatable around, an axial center (X10); and a rotary shaft (30) supported by the linearly-movable shaft (10) such that it is linearly movable along and rotatable around the axial center (X10). A stopper (50) is supported by the housing (90) and is displaceable between a blocking position at which the stopper (50) prohibits the linearly-movable shaft (10) from moving from a second position to a first position, and a nonblocking position at which the stopper (50) is separated from the linearly-movable shaft (10). The stopper (50) is biased toward the blocking position and displaces to the nonblocking position in response to a manual opening operation for displacing the lid to the open position.