To provide a door capable of alleviating an injury and a damage which can be caused when the finger or an article is caught in the door, in a case wherein a hinged door installed in an entrance of a building, a car or the like is blown by a blast or the door is strongly closed to surely lock.

A vertical folding line is formed in a door striking part (4) of a main body (1) of the hinged door, and part of the main body (1) of the hinged door is provided with a folding door structure (2) having a width of several centimeters to about 30 cm and ranging over the whole from the bottom to the top or positioned in an arbitrary position corresponding to an assumed article which may be caught in the door. The main body (1) and the folding door structure section (2) are provided with a hinge designed to integrate them or a restoration device and normally keep a door function.