To provide an oral cavity cleaner which has portability and multifunctionality by making the kinds of cleaning sections easily exchangeable according to cleaning methods and making the combination of many and diversified kinds of such cleaning sections possible and has excellent operability in cleaning of the interior of the oral cavity by making the gripping angle of a shaft body freely changeable according to the cleaning methods.

The shaft body of the oral cavity cleaner consisting of the shaft body and the cleaning section disposed at one end of the shaft body forms a hollow section by disposing an aperture at the other end of the cleaning section and has first connecting means disposed at the same end of the aperture and second connecting means disposed at the same end of the cleaning section. The cleaning section possessed by another oral cavity cleaner is made freely insertable and removable to and from the aperture so as to be made housable into the hollow section and the first connecting means and the second connecting means possessed by another oral cavity cleaner are made connectable.