To provide a wing panel which is good in appearance, replaceable, and facilitates maintenance of an interphone when the interphone is installed on a wing portion.

There is provided a door body with the wing panel 6, which is arranged in a frame body consisting of right and left jambs 4, 3, and an intermediate jamb 7 erected between the right and left jambs 4, 3. The door body 5 is rotatably mounted on the jamb 4 with its tail arranged along the jamb 4 and its front end arranged along the intermediate jamb 7. The wing panel 6 is rotatably mounted on the jamb 3 with its tail arranged along the other jamb 3 and its front end arranged along the intermediate jamb 7. The front end of the wing panel 6 is detachably fixed to the intermediate jamb 7 in normal times. The intermediate jamb 7 has a notch 74 formed in a door body-side wall surface 70 thereof, and the notch 74 has a strike 10 detachably mounted therein. Further the intermediate jamb 7 has a screw hole formed in a panel-side wall surface 71 thereof at a location corresponding to the notch 74, and a front-side end face 62 of the wing panel 6 is detachably mounted on the panel-side wall surface 71 by a screw 11 screwed from a hollow portion formed in the intermediate jamb 7. The screw 11 has its head covered with the strike 10.