PURPOSE: To reduce in weight to an extremely large extent and improve its resistance to heat by bonding thermoplastic polyether ketone of high rigidity, superior toughness and resistance to heat with acrylonitrile-butadiene copolymer rubber or non-polar general-purpose rubber.

CONSTITUTION: A bonded composite body of polyether ether ketone and rubber is composed of a bonded composite body formed by bond integrating polyether ether ketone I with acrylonitrile butadiene copolymer rubber (b) by means of an epoxy resin composition (a) containing acylonitrile-butadiene copolymer rubber, and non-polar general-purpose rubber II bonded on the acrylonitrile butadiene copolymer rubber (b) side of said bonded composite body through polynorbornane (c) or an ultra-high-molecular-weight polyethylene sheet (f).