A door actuating apparatus comprising: an engagement mechanism configured to selectively achieve an engaged state and a disengaged state where the engaged state is a state where a door that is configured to be rotatably supported by a vehicle body is retained at a full close position and the disengaged state is a state where the door is not retained at the full close position; an operating portion being configured to be operated for rotating the door that is at the full close position outward relative to a vehicle interior, the operating portion being configured to output a signal to rotate the door; a control unit configured to receive the signal from the operating portion, the control unit being configured to actuate an actuator in response to the signal; an engagement member configured to be retained by the vehicle body and engaged with the door, the engagement member being configured to advance and retract relative to the door in accordance with rotation of the door; and a door opening mechanism (40, 50) configured to operate by actuation of the actuator, the door opening mechanism (40, 50) being configured to shift a state of the engagement mechanism from the engaged state to the disengaged state by being configured to engage with the engagement mechanism that is in the engaged state, the door opening mechanism (40, 50) being configured to rotate the door from the full close position to a predetermined rotational position positioned between the full close position and a full open position by being configured to engage with the engagement member after the door opening mechanism (40, 50) shifted the state of the engagement mechanism from the engaged state to the disengaged state by being configured to engage with the engagement mechanism in the engaged state, the door opening mechanism (40, 50) being configured to allow the door to rotate in a vehicle exterior direction relative to a rotational position of the door corresponding to an operational position of the door opening mechanism (40, 50) by the door opening mechanism (40, 50) being configured to separate from the engagement member in a state where an external force rotating the door in the vehicle exterior direction is exerted on the door in a case where the engagement mechanism is in the disengaged state. an engagement mechanism configured to selectively achieve an engaged state and a disengaged state where the engaged state is a state where a door that is configured to be rotatably supported by a vehicle body is retained at a full close position and the disengaged state is a state where the door is not retained at the full close position; an operating portion being configured to be operated for rotating the door that is at the full close position outward relative to a vehicle interior, the operating portion being configured to output a signal to rotate the door; a control unit configured to receive the signal from the operating portion, the control unit being configured to actuate an actuator in response to the signal; an engagement member configured to be retained by the vehicle body and engaged with the door, the engagement member being configured to advance and retract relative to the door in accordance with rotation of the door; and a door opening mechanism (40, 50) configured to operate by actuation of the actuator, the door opening mechanism (40, 50) being configured to shift a state of the engagement mechanism from the engaged state to the disengaged state by being configured to engage with the engagement mechanism that is in the engaged state, the door opening mechanism (40, 50) being configured to rotate the door from the full close position to a predetermined rotational position positioned between the full close position and a full open position by being configured to engage with the engagement member after the door opening mechanism (40, 50) shifted the state of the engagement mechanism from the engaged state to the disengaged state by being configured to engage with the engagement mechanism in the engaged state, the door opening mechanism (40, 50) being configured to allow the door to rotate in a vehicle exterior direction relative to a rotational position of the door corresponding to an operational position of the door opening mechanism (40, 50) by the door opening mechanism (40, 50) being configured to separate from the engagement member in a state where an external force rotating the door in the vehicle exterior direction is exerted on the door in a case where the engagement mechanism is in the disengaged state.