Carbonated water manufacturing device, water purifier with the device, and stationary water purifier

A carbonated water manufacturing device (10), comprising a carbon dioxide gas supply part (1) having a carbon dioxide gas flow passage (11) and supplying carbon dioxide gas (A) via. the carbon dioxide gas flow passage (11) and a mixing part (2) having a water flow passage (21) and mixing, in the water flow passage (21), the carbon dioxide gas (A) supplied from the carbon dioxide gas supply part (1) with water (B) continuously passing through the water flow passage (21) to manufacture carbonated water (C), wherein the carbon dioxide gas supply part (1) is detachably fixed to the mixing part (2), whereby carbonated water with a proper density of carbonic acid or drinking water with refreshing taste and increased throat passing taste can be rapidly supplied by the device of simple structure with an excellent maintainability and a reduced cost.