Foamed thermoplastic resin molding with a functional component

A foamed thermoplastic resin molding with a functional component obtained by:

• supplying a molten thermoplastic resin locally to the backside of a foamed thermoplastic resin molding obtained by forming a foamed laminate sheet into a predetermined shape, which foamed laminate sheet comprises a foamed base layer comprising a foamed thermoplastic resin sheet, the foamed base layer having on at least one side thereof a skin layer laminated, and
• shaping the molten thermoplastic resin into a functional component and simultaneously integrating the functional component to the foamed thermoplastic resin molding by welding, wherein the following inequality is satisfied:
• 1<X<3{(t1/E)+t2}
• where t1 (mm) is a thickness of the foamed base layer in the portion where the functional component is integrated, E is an expansion ratio of the foamed base layer, t2 (mm) is a thickness of the skin layer, and X (mm) is a width of the welded portion of the functional component to the foamed base layer.