The present invention is concerned with expanded beads that are olefin-based thermoplastic elastomer expanded beads containing a coloring agent, wherein an apparent density of the expanded beads is 40 to 300 g/L, and an average surface layer membrane thickness (a) is 3 to 25 μm, and a molded article thereof, and is able to provide expanded beads capable of producing an expanded beads molded article which is excellent in in-mold moldability and excellent in tensile characteristics and an expanded beads molded article using the expanded beads.