To provide an attaching device of a brush, pad, etc., for a cleaner capable of smoothly and easily attaching/detaching the brush or pad, etc. to/from a cleaner body, and preventing the attached state from being easily loosened.

A number of projection pawls 12 with a structure to be fastened on the cleaner body 4 side according to the rotation of the cleaner body 4 are formed on the attaching surface of a holder board 3, and each projection pawl 12 has a return preventive pawl 12C whose section is formed in the shape of an arrowhead.