Tomonori Uchino Fukuoka Univercity Polyethylene (PE) is known to be a very convenient and high performance plastic because of an inexpensive cost and its hydrophobicity and chemical resistance property. Therefore, PE is used in many applications. On the other hand, PE is a very highly crystalline polymer and do not have any polarity on its chemical structure, it is known to be a very difficult material to modify the surface properties. Because of this reason, it has been considered that it is impossible to apply plating to the surface of PE. Recently, we have reported that the side chain crystalline polymers constructed with a monomer having a long alkane side chain shows a good adsorption property to PE due to the crystalline supramolecular interaction. Moreover, we have polymerized a Side-Chain Crystalline Block Co-Polymer (SCCBC) which is composed of the above side-chain crystalline monomer and a functional monomer (which can confer solvent-compatibility, polarity, etc.) and found that the SCCBC could modify the surface property of PE to variously. In this time, by using this function, we have tried electroless copper plating to the surface of PE.