To provide a fastener for a brassiere made of plastic, for which a conventional steel fastener is exchanged, and to which improvement necessary for such exchange is made.

A female fastener (11) comprises a base fabric (12) and female tapes (30) fixed to the base fabric at the female side. The female tapes are arranged in at least a single line, and at least one plastic female member (31) is formed to be fixed to each of the female tapes. A male fastener (21) comprises a base fabric (22) and male tapes (40) fixed to the base fabric at the male side. The male tapes are arranged in at least a single line, and at least one plastic male member (41) is formed to be fixed to each of the mail tapes. The female and male members (31, 41) comprise main bodies (32, 42), and leg parts (33, 43) joined to the main body parts. The tapes for the female and male members are fixed to the leg parts.