NOVELTY - A water purification apparatus (1) has a conduit tube (5) which separated flow changing space from bottom face of bottomed outer cylinder (2), and stood up, a lower water flow device, an ion-exchange resin grains, a top water flow device which covers storage space, and a cover component. The cover component has a vertical communicating path (9b) which pours condensed water (W1) to upper portion of conduit tube through a receptacle, and a lead-out channel. The lower water flow device is conical water flow plate which is joined to the conduit tube.    USE - Water purification apparatus is used for purifying condensed water dripped from condenser in fuel cell electric power generation system.    ADVANTAGE - The compact water purification apparatus efficiently and economically purifies condensed water dripped from condenser.    DETAILED DESCRIPTION - A water purification apparatus has a conduit tube which separated flow changing space from bottom face of bottomed outer cylinder, and stood up, a lower water flow device which ensures flow changing space by carrying out bottom raising support of conduit tube, an ion-exchange resin grains with which storage space between bottomed outer cylinder and conduit tube is filled using the lower water flow device as an accommodation bottom, a top water flow device which covers storage space, and a cover component which covers pipe upper end portion of conduit tube, and pipe upper end portion of bottomed outer cylinder. The cover component has a vertical communicating path which pours condensed water to upper portion of conduit tube through a receptacle, and a lead-out channel which leads-out pure water which overflowed from the top water flow device. The lower water flow device is conical water flow plate which is joined to the conduit tube and has spread towards the bottom face and comprises openings. The water flow aperture ratio of lower side is more than the water flow aperture ratio of upper side of conical water flow plates.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of the water purification apparatus.    Water purification apparatus (1)    Outer cylinder (2)    Conduit tube (5)    Vertical communicating path (9b)    Condensed water (W1)