CORE MATERIAL

Provided is a core member used for a laminate including the core member and polyurethane foam laminated on the core member, and the core member improves dimensional stability during production of the laminate and is easily separated from the polyurethane foam during disassembly of the laminate.A core member (100C) used for a laminate in which polyurethane foam is laminated on the core member (100C) made of a thermoplastic resin expanded beads molded article (100) is configured such that the expanded beads molded article (100) is a molded article in which expanded beads (20) having through holes (22) are mutually fused, an average porosity of the expanded beads molded article (100) is 10% or more and 25% or less, and on a surface of the expanded beads molded article (100), a ratio of a total opening area of the through hole portions (14) of the expanded beads (20) to a surface area of the expanded beads molded article (100) is 2% or more and 5% or less, an average opening area of the through hole portions (14) of the expanded beads (20) is 5 mm2 or more and 20 mm2 or less, and the ratio of a total number of through hole portions (14) having an opening area of 2 mm2 or more to the total number of through hole portions (14) of the expanded beads (20) is 60% or less.