A hydrogen water machine (3) includes a hydrogen generator (31), a water supplier (32), a mixing device (33) connected between the hydrogen generator (31) and the water supplier (32), and a recirculation pipe (34) connected between the mixing device (33) and the water supplier (32) . Accordingly, the mixing device (33) allows hydrogen generated by the hydrogen generator (31) to dissolve in water provided by the water supplier (32), thereby generating hydrogen water. Part of the hydrogen water recirculates from the recirculation pipe (34) to the water supplier (32) for being proceeded by the mixing device (33) again. Therefore, the recirculation not only increases hydrogen concentration of the hydrogen water but also prolongs the time of dissolving the hydrogen in the water, thereby achieving a preferable mixing effect between the hydrogen and the water.
