To provide a foamed blow molded product which is uniformly foamed, lightweight, has high foaming magnification and high heat-insulating property, and is excellent in stiffness and heat resistance.

The foamed blow molded product having high foaming magnification, lightweight, and excellent in heat-insulating property, stiffness and heat resistance, is obtained by using a polypropylene-based resin composition containing a polypropylene-based resin and a polyethylene-based resin having a specific molecular weight and a long-chain branched structure.