Abstract: A thick foam molding having a size permitting the formation of a sphere having a diameter of at least 200 mm by cutting. The foam molding is obtainable by molding expanded thermoplastic resin beads in a mold cavity and having a fusion-bonding efficiency of at least 50% throughout, wherein each of the expanded thermoplastic resin beads comprises a core which is in an expanded state and which comprises a crystalline thermoplastic resin, and a coat which is in a substantially unexpanded state and which surrounds the core. The coat comprises a crystalline polyolefin polymer which is lower in melting point by at least 15° C. than that of the crystalline thermoplastic resin or a non-crystalline polyolefin polymer which is lower in Vicat softening point by at least 15° C. than that of the crystalline thermoplastic resin.