To solve the following problem: in the two-color molding of a cap and a clip, although the cap and the clip are designed not to be detached, owing mainly to the difference in shrinkage ratio between the cap and the clip immediately after molding, a clearance is formed between the joining surfaces of the cap and the clip, and distortion is generated in one part.

In a member, two or more components are formed integrally according to the gist of two-color molding or insert molding. The components are molded by the two-color molding using the same material. Alternatively, the components are formed integrally by the two-color molding to produce the member. The components are molded by the two-color molding with the melting points of the components made equal.