A hydrogen water generator includes a water supply part including a water supply passage including an inlet and an outlet; a water tank coupled to the outlet for receiving and storing water supplied to the inlet; an electrode module coupled to the water tank for generating hydrogen to generate hydrogen water in the water tank; and a water outlet for discharging the hydrogen water stored in the water tank. The water supply passage includes a delayed discharge outlet which is a portion of the water supply passage having a smallest cross-sectional area of a flow path in the water supply passage.