An electrolyzed water producing apparatus capable of producing electrolyzed water of a certain quality and capable of efficiently sterilizing the inside. A reverse osmosis membrane permeated water generating device, an electrolyte adding device connected to a downstream side of the reverse osmosis membrane permeated water generating device, and an electrolytic device connected to a downstream side of the electrolyte adding device. The electrolyzed water production apparatus 100 includes a water storage tank 70 connected to the electrolyzer 50, and the electrolyzer 50 includes a pair of a first electrode 57 and a second electrode 67 disposed in parallel to each other. The first electrolysis chamber 55 and the second electrolysis chamber 65 are formed by a diaphragm 69 extending in parallel with the electrode pair between the electrode pairs, and the raw electrolysis water flows only to the first electrolysis chamber 55. Electrolyzed water production comprising a flow-type electrolytic cell configured to sequentially flow only to the second electrolysis chamber 65 after being made, and having polarity changing means for freely switching the electrode polarities of the first electrode 57 and the second electrode 67 Device 100. [Selection] Figure 1【課題】一定の水質の電解水の製造が可能な電解水製造装置であって、内部を効率的に殺菌できる電解水製造装置の提供。【解決手段】逆浸透膜透過水生成装置１０と、逆浸透膜透過水生成装置１０の下流側に接続される電解質添加装置３０と、電解質添加装置３０の下流側に接続される電解装置５０と、電解装置５０に接続される貯水タンク７０と、を含んで成る電解水製造装置１００であって、電解装置５０は、互いに平行に配設された第１電極５７及び第２電極６７から成る一対の電極対を備え、前記電極対間に前記電極対と平行に張設された隔膜６９により第１電解室５５及び第２電解室６５が形成され、電解原水を第１電解室５５のみに流通させた後に第２電解室６５のみに順次流通する様に構成した流通型電解槽を備え、かつ第１電極５７及び第２電極６７の電極極性を自在に入れ替える極性変更手段を具備する電解水製造装置１００。【選択図】図１
