The present invention relates to a brush head attachment, in particular for an electric sonic toothbrush, comprising a shank member carrying a bristle bundle, and a coupling member (1) provided on the fastening-side end of said shank member with at least one connection surface for a drive shaft of said handpiece which, when a brush head attachment is mounted on a handpiece, protrudes into said coupling member (1), a spring element that can be operatively connected with said drive shaft for securing said drive shaft to said brush head attachment and/or transferring a drive motion of said drive shaft to said brush head attachment, and a metal ring (4) disposed in a widened fastening foot (2) formed by said coupling member (1). In this inexpensively manufactured brush head attachment according to the present invention, said metal ring (4) is a die-cast member.
