Temporary fixing method and the surface protecting method of the resin composition and the workpiece using the same

It has a high adhesive strength, and provides a temporary fixing method for members used resin composition for temporary fixing adhesive agent easily peel in water and it. Component (A): N, and N- diethyl acrylamide and / or N- isopropylacrylamide, (B) component: N- vinyl-2-pyrrolidone homopolymer, N, homopolymers of N- dimethylacrylamide, N, homopolymers of N- diethyl acrylamide, homopolymers of acryloyl Moro Folin, homopolymers of N- isopropylacrylamide; and N- vinyl-2-pyrrolidone, N, N- dimethylacrylamide, N, N- diethyl acrylamide, acryloyl Moroforin, and one or more selected from the group consisting of a copolymer of two or more monomers selected from the group consisting of N- isopropylacrylamide and, (C) component: by containing a polymerization initiator resin composition characterized. Surface protecting method for temporarily fixing method and the member of a member using the resin composition.