An apparatus for preparing hydrogen water includes: an electrolysis device configured to electrolyze water and including an electrode module formed of a positive electrode, a negative electrode, a solid polymer electrolyte membrane, and an auxiliary electrode, wherein the electrolysis device is divided into a first chamber and a second chamber with the electrode module as a center; a hydrogen water discharge port configured to discharge hydrogen water including active hydrogen generated at the negative electrode of the first chamber, by being arranged in the first chamber; a spray port configured to spray water toward the negative electrode, by being arranged in the first chamber; an ozone water discharge port configured to discharge water including ozone generated at the positive electrode of the second chamber; a storage tank configured to store hydrogen water and sterilizing water in an internal space thereof, by being connected to a first flow channel connected to the hydrogen water discharge port and to a second flow channel connected to the first flow channel and receiving the hydrogen water generated in the first chamber, and by receiving the sterilizing water generated in the second chamber through a fourth flow channel connected to the ozone water discharge port; and a pump including an output end connected to the a flow channel connected to the spray port and an input end connected to a fifth flow channel connected to a bottom surface of the storage tank, wherein the spray port sprays the hydrogen water stored in the storage tank, using a pressure of the pump, faster than a flow velocity of the hydrogen water discharged through the hydrogen water discharge port.