Abstract: A retaining member on a handle for the exchangeable attachment of an interdental brush (29) exhibiting a fastening element (36) with transverse element (37) has a recess which is designed so that the interdental brush (29) can be introduced in the direction of its longitudinal axis, with the transverse element (37) leading, into the recess (34) and can be locked in place in the latter especially by being folded over.