Abstract: The invention is concerned with a connector for single-fibre and multi-fibre optical waveguides, preferentially made from plastic material and comprising a male part and a female part each having a plastic housing with guide and locking elements in which housings the end portions of the optical waveguides to be connected are coaxially secured. In accordance with the invention at least the plastic housing (2) of the male part (1) is of integral design and is sealingly secured by moulding to the at least partly bared end portions of the optical waveguides (3, 4).