A heat insulating structure for an agricultural house is provided that is easy to construct and attaches a plastic film layer on an existing glass agricultural house and forms a heat insulating space therebetween to save energy. A glass pressing portion 2 having a T-shaped cross section is integrally provided on an upper portion of a frame main body 1 to form a glass fixing frame 3 which is attached to an upper portion of a roof frame 4 with an interval. Insert the ends of the adjacent glasses 5 and 5 into the glass retainer 2 and hold the glass agricultural house by pressing the upper surface of the end of the glass 5 at both ends of the plastic glass retainer cover 7 that covers the glass retainer 2. Form. Further, a rail holder 13 is joined to the upper surface of the glass presser cover 7 with an adhesive 10, and the bottom surface of the film fixing rail 15 is fixed to the upper portion with a screw 16, and the inner side of the film fixing rail 15 is fixed. A film layer 20 is formed by stretching the film 17 over the glass 5, and a heat insulating space 22 is formed between the film 5 and the glass 5. [Selection] Figure 1【課題】施工が容易で既設のガラス農業用ハウスの上にプラスチックフイルム層を取付け、この間に断熱空間部を形成して、省エネルギー化を図った農業用ハウスの断熱構造を提供する。【解決手段】フレーム本体１の上部に断面Ｔ形状のガラス押え部２を一体に設けてガラス固定フレーム３を形成し、これを屋根フレーム４の上部に間隔をおいて取付け、ガラス固定フレーム３のガラス押え部２に、隣接するガラス５、５の端部を着挿し、ガラス押え部２に被せたプラスチック製のガラス押えカバー７の両端でガラス５の端部上面を押えてガラス農業用ハウスを形成する。さらに、ガラス押えカバー７の上面に接着剤１０を介して、レ－ル受台１３を接合し、更にこの上部にフイルム固定レール１５の底面をビス１６で固定し、このフイルム固定レール１５の内側にフイルム１７を張り渡してフイルム層２０を形成し、ガラス５との間に断熱空間部２２を形成したものである。【選択図】図１
