<;P>;PROBLEM TO BE SOLVED: To provide a heat-reserving curtain simple in setting, and to provide an agricultural/horticultural greenhouse. <;P>;SOLUTION: The heat-reserving curtain 103 is provided with a covering material covering a specific space in the agricultural/horticultural greenhouse 100, and a slung part which can be detachably slung from the agricultural/horticultural greenhouse 100. The heat-reserving curtain 103 is suspended via wire hooks 104 from the agricultural/horticultural greenhouse 100. <;P>;COPYRIGHT: (C)2009,JPO&INPIT