TECHNICAL FIELD The present invention relates to an opening / closing vinyl fixing device and a greenhouse, which can freely open and close an opening / closing window formed on a roof using the opening / closing vinyl fixing device, and a vinyl opening / closing drive unit (switch) is at the lowest end of vinyl. When the vinyl support pipe is closed, the vinyl support pipe closes the existing fixed idea that the vinyl support pipe is slightly wound without completely unraveling the vinyl of the vinyl window and is located on the outer part of the vinyl window. Turn the vinyl a little more and the vinyl will completely melt and the vinyl support pipe is located between the arc frame and the vinyl of the vinyl window to form a space, and the vinyl support pipe is fixed by the opening and closing vinyl fixing device between the spaces It is characterized by making it.本発明は開閉ビニール固定装置及びビニールハウスに関し、開閉ビニール固定装置を利用して屋根に形成された開閉窓を自在に開閉することができ、ビニール開閉駆動部(開閉器)がビニールの最下端に位置した時、ビニール支持パイプがビニール窓のビニールを完全に解かないで若干巻いてビニール窓の外部分に位置しているという既存の固定観念を打破して、ビニール窓を閉める時、ビニール支持パイプをもうちょっと回してビニールが完全に解けてアークフレームとビニール窓のビニールとの間にビニール支持パイプが位置されて空間を形成し、その空間の間で開閉ビニール固定装置によってビニール支持パイプが固定されるようにすることを特徴とする。