A metal-FRP composite body 100 comprises a metal member 101, an FRP layer 102 and a bonding resin layer 103 that is interposed between the metal member 101 and the FRP layer 102. The bonding resin layer 103 is a solidified product of a phenoxy resin (A) by itself, or alternatively, a cured product of a bonding resin composition that contains 50 parts by weight or more of the phenoxy resin (A) in 100 parts by weight of the resin components; and the bonding resin layer 103 firmly bonds the metal member 101 and the FRP layer 102 to each other. The bonding resin composition may additionally contain 5-85 parts by weight of an epoxy resin (B) relative to 100 parts by weight of the phenoxy resin (A), and a crosslinking agent (C) that contains an acid dianhydride.