A process produces a polyolefin-based resin expanded beads molded article that is excellent in bending deflection characteristics, high in porosity, low in bulk density and light in weight, and has interconnected void spaces. The process comprises filling, in a mold cavity, multi-layered polyolefin-based resin expanded beads each of which has a cylindrical, polyolefin-based resin expanded core layer and a polyolefin-based resin outer layer covering the expanded core layer and which satisfy specific requirements, introducing steam in the mold cavity to heat the multi-layered expanded beads filled in the mold cavity to fuse bond and mold the multi-layered expanded beads in the mold cavity.