To improve safety of a door by forming the inner and the outer side of the door with an easily breakable or a freely detachable panel and providing a wire between the panels in a removable manner or in a freely loosely manner.

A door such an emergency door is composed of a door peripheral frame 1, an inner and an outer panels 2, 3, and a wire 6 made wire stretched area 4 provided in a gap 5. When the door is not able to be opened or closed due to deformed door fitting outer frame 20 caused by an earthquake or the like, among the wire 6 stretched around the gap 5, the exposed part 10 of the wire 6 appearing on the surface of the inner side panel 3 is cut or removed. The wire 6 in the wire stretched part 8 stretched around in a radial manner at a central loop part 7 becomes free and drops down to the lower part of the gap 5. A passage is made by making a hole on the panels 2, 3 by applying force to either panel. At normal time, the wire stretched area 4 prevents trespassing from outside and also serves to reinforce the door. Thus one can facilely extricate her/himself from a room to the outside.