An object of the present invention is to provide a trough for a vinyl house that suppresses the occurrence of condensation on the trough itself. A valley trough 1 for a vinyl house disposed along a longitudinal direction of a trough between adjacent vinyl houses, wherein a heat insulating material 7 is adhered to the lower surface of the trough body 6. Since the heat insulating material 7 is adhered to the lower surface of the valley main body 6, the occurrence of condensation on the lower surface of the valley is suppressed by the temperature difference between inside and outside the house. Moreover, since the cool air of the main body of a valley is interrupted blocked by the heat insulating material of a lower surface, it is suppressed that this cool air is transmitted in a house. [Selection] Figure 2【課題】谷樋自体の結露の発生を抑制したビニルハウス用谷樋の提供。【解決手段】隣接するビニルハウス間の谷部長手方向に沿って配設されるビニルハウス用谷樋１であって、谷樋本体６の下面に断熱材７が貼着されたものであり、谷樋本体６の下面に断熱材７が貼着されているため、ハウス内外の温度差によって谷樋下面の結露の発生が抑制される。また、谷樋本体の冷気も下面の断熱材により遮断されるので、この冷気がハウス内に伝達されることも抑制される。【選択図】図２
