Provided is a process for producing a metal-resin bonded object in which the metal member has been untied with the resin member constituted of a thermoplastic resin, the process being easier and versatile, being capable of imparting stable bonding strength to the bonded surfaces of the metal member and resin member, and giving no damage, etc. to the metal member, etc. of the metal-resin bonded object. The process, which is for producing a metal-resin bonded object by bonding a metal member to a resin member constituted of a thermoplastic resin, comprises: superposing beforehand a resinous bonding layer that comprises a thermoplastic resin having compatibility with the resin member and has a thickness of 0.01-9 mm, on the surface of the metal member which is to be bonded; and heating the surfaces to be bonded of the resinous bonding layer of the metal member and the resin member to compatibilize and bond the resinous bonding layer and the resin member.
