[PROBLEMS] To increase the strength of a frame even in an agricultural house with a plastic sheet by an extremely simple structure, to increase the strength against snow and to reduce collapse, and to work in the house in seasons other than winter. Provides an easy agricultural house reinforcement structure. In an agricultural house in which a roof is formed by a truss structure of a pipe, a lower end of a roof suspension pillar is protruded downward from a beam pipe, and a pipe receiving portion is provided on a base plate. The column lower receiving member 15 is detachably installed on the ground 14 in the house, and the lower end portion of the reinforcing column 19 formed of a pipe is detachably inserted and fixed to the column lower receiving member 15. At the same time, the lower end of the suspension column 10 is inserted into the upper end of the reinforcing column 19. [Selection] Figure 4【課題】極めて簡単な構造により、プラスチックシートを張った農業用ハウスでもフレーム強度を増大させて、積雪に対する強度を増して倒壊を少なくすると共に、冬季以外の季節には、ハウス内での作業も容易な農業用ハウスの補強構造を提供する。【解決手段】屋根がパイプ２のトラス構造で形成された農業用ハウスにおいて、屋根の吊り柱１０の下端を梁パイプ１１より下方に突出させ、ベース板１６の上にパイプ受け部１７を設けた支柱下部受け部材１５を、ハウス内の地面１４の上に着脱自在に設置し、この支柱下部受け部材１５にパイプで形成された補強支柱１９の下端部を係脱自在に挿着して固定すると共に、補強支柱１９の上端に吊り柱１０の下端を挿着する。【選択図】図４
