Door opening and closing apparatus

A door opening and closing apparatus for opening and closing a door, comprising:

• an actuator that moves the door in an opening direction and a closing direction;
• and
• a lock mechanism that holds the door in a fully closed state, and has an engaging member which engages with a lock member provided in the door when in the fully closed state, and a link mechanism which has three link members including a central link member provided between two link members of the three link members, is configured to be able to undergo deformation into a linear state and a bent state, and restricts rotation of the engaging member by being brought into the linear state,
• wherein the central link member has a first face that is pressed by a projecting shaft moved by the actuator in order that the link mechanism changes from the linear state to the bent state, and a second face that is pressed by the projecting shaft in order that the link mechanism changes from the bent state to the linear state, and
• the first face and the second face are provided so as to have a positional relationship in which the first face and the second face intersect each other.