PROBLEM TO BE SOLVED: To provide a rooftop greening facility which can successfully prevent decrease or degradation in the power generation efficiency, under a high temperature, of a solar panel installed on the rooftop of a building where a rooftop greening is constructed, and also achieve effective utilization of water stored in a water storage and used for greening at the rooftop.SOLUTION: The rooftop greening facility includes: the water storage for greening that stores water for growing plants at the rooftop for greening； the solar panel installed on the rooftop； a water supply device for supplying the solar panel with the water stored in the water storage for greening. The rooftop greening facility is characterized in that: the water supplied to the solar panel is returnable to the water storage for greening； and the repeat of supplying the water to the solar panel and returning the supplied water to the water storage for greening allows the water to be used in circulation.本發明提供一種使用太陽能板的屋頂綠化的施工設備，能妥善防止被設置於屋頂綠化施工的建築物屋頂部的太陽能板，在高溫下發電效率的降低和劣化，且能有效的利用屋頂部綠化用儲水部的水。本發明的特徵係：具備儲存在屋頂部使植物生長而進行綠化的水的綠化用儲水部，及被設置於屋頂部的太陽能板和供給儲存於前述綠化用儲水部的水至太陽能板的水供給手段；被供給至前述太陽能板的水係可回送至前述綠化用儲水部，供給太陽能板的水與綠化用儲水部供給的水來回輸送，構成循環使用水的方式。
