the superoxide anion and the oh radical generated by the photocatalyst reaction unit 114 can smoothly move to the head part 120 through the inside of the toothbrush body 110 together with the external inflow air flowing into the toothbrush body 110 along the air inflow opening 117 the head part 120 is joined with the upper end part of the toothbrush body 110 to be exchangeable and includes a brush 121 used to brush teeth and an air transfer unit 122 which is configured as one body with the brush 121 and is exchangeably jointed with the upper end part of the toothbrush body 110 to transfer the superoxide anion and the ho radical transferred by the air pump 115 together with external inflow air to the vicinity of the brush 121 and discharges the superoxide anion and the ho radical together with the external inflow air here the brush 121 is configured in a form similar to or same as a brush constituting a general toothbrush further an air flow path 122 a through which air or the like can smoothly flow is formed inside the air transfer unit 122 and a plurality of air discharge openings 122 b connecting to the outside are formed at an end of the air flow path 122 a in this case the plurality of air discharge openings 122 b are formed in the vicinity of the brush 121 and are configured to discharge the superoxide anion and the oh.