A method for manufacturing multilayer foam where easy generation of dead air and improvement in foam magnification is offered. Multilayer resin that has non-foam layer outside foam layer is pushed out, the innermost side of the multilayer resin is bonded mutually, and multilayer resin laminating body is formed. Multilayer resin laminating body is clamped in the empty space between outermost side of multilayer resin laminating body and cavity side with metal mold. Multilayer resin laminating body is molded in the shape along cavity side, and the multilayer foam is molded.