PROBLEM TO BE SOLVED: To provide an agricultural house which is hard to break even in strong winds such as typhoons and whose cost is suppressed, and to provide a balloon member for opening and closing an opening part of an agricultural house.SOLUTION: An agricultural house according to one aspect of the present invention has an opening part, a balloon member installed to open and close the opening part, and a pump mechanism which controls the aeration into and deaeration of the balloon member. The agricultural house may further has a supporting body for supporting the balloon member, and the supporting body may comprises a rod-shaped body arranged horizontally. The balloon member may have a tubular holding member having opening both ends and the rod-shaped body may penetrate the holding member from one opening toward another opening. The balloon member may have a penetrating hole and the rod-shaped body may penetrate the penetrating hole. The support may be a transparent plate-like body arranged horizontally. The agricultural house is formed of a resin film. A second balloon member provided to contact the edge and the balloon member along the edge of the opening part may also be comprised.SELECTED DRAWING: Figure 1【課題】台風などの強風でも壊れにくくかつコストが抑制された農業用ハウス及び開口部開閉用風船部材を提供する。【解決手段】本発明の一態様に係る農業用ハウスは、開口部と、この開口部を開閉可能に設置される風船部材と、この風船部材への吸気及び脱気を制御するポンプ機構とを備える。当該農業用ハウスは上記風船部材を支持する支持体をさらに備えるとよく、上記支持体が水平配置される棒状体を含むとよい。上記風船部材が、両端が開口した管状の保持部材を有し上記棒状体が上記保持部材を一方の開口から他方の開口に向かって貫通しているとよい。上記風船部材が貫通孔を有し上記棒状体が上記貫通孔を貫通しているとよい。上記支持体が水平配置される透明な板状体であってもよい。当該農業用ハウスは樹脂膜により形成され上記開口部の縁に沿って上記縁及び上記風船部材に接するように設けられた第２風船部材をさらに備えるとよい。【選択図】図１
