TECHNOLOGY FOCUS - POLYMERS - Preferred Properties: The resin (R) has number average molecular weight of 10000-250000 and glass transition temperature of -40 degrees C to 100 degrees C. The resin (R) has hydroxyl group and/or amino group, and has sum of hydroxyl value and amine titer of 2-100 mg potassium hydroxide/g. Preferred Composition: The resin (R) is chosen from fluorine resin, olefin resin, polyester-based resin, polyurethane-type resin, polyurethane urea-type resin and polyamide-type resin. The carbon-carbon double bond originating in (meth)acryloyl group is contained in resin (R), which is resin (Ra) other than (meth)acrylic-type copolymer having carbon-carbon double bond originating in (meth)acryloyl group, and contained in a compound (B) having (meth)acryloyl group and not in resin (R), which is resin (Rb) other than (meth)acrylic-type copolymer (A) does not having (meth)acryloyl group. The adhesive agent contains polyisocyanate compound, and molar ratio of isocyanate group is 0.1-10 with respect to sum of hydroxyl group and amino group. The resin (Ra) is resin obtained by adding (meth)acrylic-type monomer having isocyanate group to hydroxyl group and/or amino group of resin (Rb), resin obtained by adding (meth)acrylic-type monomer having glycidyl group to carboxyl group of resin (Rb), resin obtained by adding (meth)acrylic-type monomer having carboxyl group to glycidyl group of resin (Rb), resin obtained by adding (meth)acrylic-type monomer having hydroxyl group to acid-anhydride group of resin (Rb), or resin having carbon-carbon double bond and obtained by polymerizing component having (meth)acryloyl group in side chain, and component does not having (meth)acryloyl group in side chain. The content of compound (B) having (meth)acryloyl group is 0.1-20 pts. wt. with respect to 100 pts. wt. resin (Rb). The compound (B) has 2 or more (meth)acryloyl groups in molecule. The sealing material (II and/or IV) contains organic peroxide and ethylene-vinyl acetate copolymer.