The present invention concerns a plaster for attaching a trachestoma valve or the like in connection with a tracheostoma on a person's neck. The plaster comprises a socket and an annular flange, communicating with a central opening of the flange which is connected with a single-coated adhesive tape which extends radially beyond the edge of the flange. The connection includes a first annular joint at or inwardly of the outer periphery of the flange, and a second annular joint located between the outer periphery of the flange and the inner periphery of the flange spaced radially from the first annular joint. A protecting liner covers the adhesive on the tape.