A dialysate production apparatus (1) is provided with an electrolyzed water producing device (7) for dissolving hydrogen in raw water, and a reverse osmosis membrane treatment device (9) that is connected to the electrolyzed water producing device (7) and performs reverse osmosis membrane treatment upon water in which hydrogen has been dissolved. After treatment with dialysate (27) has finished, raw water (2) that has not been treated by the electrolyzed water producing device (7) is fed to the reverse osmosis membrane treatment device (9) via the electrolyzed water producing device (7).本發明關於一種透析液製造裝置的清洗方法。透析液的製造裝置(1)包括:使氫溶解於原水中的電解水生成裝置(7);以及與電解水生成裝置(7)連接且對溶解有氫的水進行逆滲透膜處理的逆滲透膜處理裝置(9)。在利用透析液(27)進行的治療結束之後,經由電解水生成裝置(7),將沒有由電解水生成裝置(7)進行處理的原水(2)供向逆滲透膜處理裝置(9)。1‧‧‧透析液的製造裝置2‧‧‧原水3‧‧‧預濾器4‧‧‧軟水化裝置5‧‧‧碳濾器7‧‧‧電解水生成裝置(氫溶解裝置)8‧‧‧電解水箱9‧‧‧逆滲透膜處理裝置25‧‧‧逆滲透水26‧‧‧透析液調製裝置27‧‧‧透析液30‧‧‧UF模組36‧‧‧逆滲透膜37‧‧‧逆滲透水箱40‧‧‧透析裝置50‧‧‧患者
