A joined metal-resin plate body having a metal plate (1, 12) and a resin plate (2, 13) joined together, in which an insert member having a through-hole therein is embedded in the resin plate. The insert member is in close contact with the resin of the resin plate in the outer periphery of the insert member except for the faces where the through-hole opens. The metal plate has a metallic joining member (4, 16) adhered thereto. The resin plate is joined to the metal plate with the aid of the joining member fitted in the through-hole. The insert member and the surrounding resin have elastic stresses (F3, F4), which give rise to a sufficient joining strength among the joining member, the insert member and the resin plate. The stress of the surrounding resin is due to elastic deformation. The amount (V2-V3) of the elastic deformation is smaller than the amount (V2) of deformation of the insert member which can give rise to an elastic stress (F3) of the insert member.