PROBLEM TO BE SOLVED: To provide a falling water prevention device in a multi-span type greenhouse that can reliably prevent water such as dew condensation water from falling into a field etc. below a trough of the multi-span type greenhouse, improve heat retention and maintain a good environment inside the greenhouse.SOLUTION: The falling water prevention device 10 in a multi-span type greenhouse comprises: a plurality of support columns 12 erected to be spaced apart from each other along the longitudinal direction of a trough 102 below the trough 102 formed between the roofs of the multi-span type greenhouse； a convergent sheet member 14 which is extended along the longitudinal direction of the trough 102 and opens upward at both sides below the trough so as to be close to the bottom edge thereof； a plurality of gutter members 16 provided long at the lower end of the convergence sheet member 14 along the longitudinal direction and opening on the upper side and bridging between adjacent support columns 12； and a gutter receiving portion 18 including an engaging portion 24 for receiving and supporting the end portion of the gutter member 16 provided at a predetermined height position from the ground of the support column 12 and having a flow path 26 for communicating between gutter members 16 arranged at the front and rear of the support columns 12 and allowing water to flow therethrough.SELECTED DRAWING: Figure 2【課題】連棟型ハウスの谷部下方の圃場等に結露水等の水が落ちるのを確実に防止し、保温性も向上させてハウス内環境を良好に保持できる連棟型ハウス内の落水防止装置を提供する。【解決手段】連棟型ハウスの屋根間に形成される谷部１０２の下方に、該谷部１０２の長手方向に沿って互いに離隔して立設される複数の支柱１２と、谷部１０２の長手方向に沿って該谷部下方の両側に上方を開放し下端を近接するように張設された収束シート体１４と、収束シート体１４の下端に長手方向に沿って長く設けられ、上面側を開口して隣接する支柱１２どうしの間に架設される複数の樋部材１６と、支柱１２の地面から所定の高さ位置に設けられる該樋部材１６の端部を受けて支持する係合部２４を含む樋受部１８であって、該支柱１２の前後に配置される樋部材１６どうしを連通して水を流す流路２６を有する樋受部１８と、を備えた連棟型ハウス内の落水防止装置１０から構成される。【選択図】図２
