To provide an emergency exit door applied to an aircraft, reducing the extruding force, and capable of being easily removed by fitting reinforcing materials to the door, and removing the door after removing them.

Lower reinforcing materials 11 having a T-shaped cross section are fitted on both sides of the emergency exit door 10 by rivets or the like, T-shaped upper reinforcing materials 1 are brought into contact with their flange faces, and pins 2 are inserted and supported at two positions. An L- shaped connecting metal fitting 3 is connected to one end of each pin 2, the connecting metal fittings 3 at two positions are connected together by a link 5, and the link 5 is connected to a handle (not shown in the figure) supported on a handle bracket 6. The door 10 is reinforced by the reinforcing materials 11, 1 to prevent its drop by wind pressure during the normal flight. At an emergency, the handle is operated to activate the link 5 and the connecting metal fitting 3, the pins 2 at two positions are extracted, the upper reinforcing materials 1 are removed, then the door 10 is pushed and removed, therefore the pushing force is reduced.