A handpiece attaching/detaching device for attaching and detaching a dental handpiece to and from a handpiece mounting terminal of a dental handpiece cleaning device comprises: a ring member which is fixed to the handpiece mounting terminal and is used to hold a connection end portion of the handpiece a function ring which slidably fits to the outside of the ring member and an operation lever which is coupled to the function ring. The ring member has a grooved portion that includes slotted grooves which are cut from one end. The handpiece can be attached to or detached from the ring member by operating the operation lever so as to slide the function ring and expand or reduce the inner diameter of the grooved portion of the ring member. The dental handpiece cleaning device comprises a handpiece mounting terminal which is provided with such a handpiece attaching/detaching device.用以在齒科用手機洗淨裝置的手機安裝端子裝卸齒科用手機的手機裝卸裝置,具備:環構件,係固定於手機安裝端子,用以保持手機的連接端部;作用環,係可滑動地嵌合於環構件的外側;及操作桿,係連結於該作用環。環構件具有,具有從一端切入的開槽之附有溝槽部。藉由操作桿的操作使作用環滑動,使環構件的附有溝槽部的內徑擴縮,而能從環構件裝卸手機。齒科用手機之洗淨裝置具備設置有這樣的手機裝卸裝置的手機安裝端子。A‧‧‧手機洗淨裝置B‧‧‧手機裝卸裝置1‧‧‧洗淨室3‧‧‧手機8‧‧‧操作桿18‧‧‧頂板
