PROBLEM TO BE SOLVED: To use, as an opening, a wider range out of the whole area of a preparation face, e.g., an end face, for preparing the opening for an entrance of a plastic greenhouse.SOLUTION: The door structure for the entrance of the plastic greenhouse includes: the square opening 2 constituting the entrance of the plastic greenhouse 1； an upper rail part 3 disposed inside along the upper side of the square opening 2, and a lower rail part 4 disposed inside along the lower side of the square opening 2； a pair of folding doors 5, 5 composed of revolving doors 5a and moving doors 5b disposed between the upper and lower rail parts； upper connecting means 6 for connecting the upper sides 5a1 of the respective revolving doors 5a, 5a to the upper rail part 3, and lower connecting means 7 for connecting the lower sides 5a2 of the revolving doors 5a, 5a to the lower rail part 4； suspension means 8 for suspending the upper sides 5b1 of the respective moving doors 5b, 5b movably and rotatably from the upper rail part 3； and sliding members 9 for engaging the lower sides 5b2 of the moving doors 5b, 5b rotatably and slidably with the lower rail part 4.【課題】ビニールハウスの出入口の開口部を作成する作成面、例えば、妻面にその全面積のうちのより広い範囲を開口部として利用可能にすること。【解決手段】ビニールハウス１の出入口を構成する方形開口部２と、方形開口部２の上辺に沿ってその内側に配した上部レール部３及び下辺に沿ってその内側に配した下部レール部４と、その間に配した回転ドア５ａ及び移動ドア５ｂからなる一対の折りたたみドア５、５と、各々の回転ドア５ａ、５ａの上辺５ａ１を上部レール部３に結合する上部結合手段６及び回転ドア５ａ、５ａの下辺５ａ２を下部レール部４に結合する下部結合手段７と、各々の移動ドア５ｂ、５ｂの上辺５ｂ１を上部レール部３に移動自在かつ回転自在に吊り下げる吊り下げ手段８及び移動ドア５ｂ、５ｂの下辺５ｂ２を下部レール部４に回転自在かつスライド自在に係合するスライド部材９とで構成する。【選択図】 図２
