A first object of the present invention is to provide a micro-bubble generator of carbon dioxide which is arranged so as to enhance health promoting effects such as improvement of blood circulation due to carbon dioxide gas generated by dissolving a tablet, thereby exhibiting effects of taking a shower of bicarbonate with appropriate concentrations for a prolonged period of time. And, a second object thereof is to provide a micro-bubble generator of carbon dioxide which is arranged so that a rate of dissolution of a carbonated bath tablet is optimized, by which the tablet is kept longer, exchanged less frequently, resulting in reduction in running costs, and also the generator can be attached to a generally available shower unit, thus making it possible to exchange and load the tablet easily and in a short period of time, and the present invention is characterized that a micro-bubble generator of carbon dioxide which is installed at a water supply channel of hot water to eject carbon dioxide gas/micro-bubbles mixed water, and a micro-bubble generator of carbon dioxide which is disposed between a shower unit and a hose, having an opening/closing mechanism, in which there is installed a carbonated bath tablet accommodating portion for accommodating a carbonated bath tablet.
