The present invention provides an edge member that can accommodate tubular members of a plurality of sizes, and a decorative board base material using the edge member. A decorative plate base material (1) includes a metal tubular member (2) and a pair of edge members (3) fitted to upper and lower ends of the tubular member (2), respectively, the edge members (3) having a longitudinal shape. A pair of end members 5 separate from the body member 4 are provided at both ends of the body member 4 . [Selection drawing] Fig. 1【課題】複数種の寸法の筒状部材に対応することができるエッジ部材、このエッジ部材を用いた化粧板基材を提供する。【解決手段】化粧板基材1は、金属製の筒状部材2と、筒状部材2の上下の端にそれぞれ嵌め込まれる一対のエッジ部材3と、を備え、エッジ部材3は、長手形状の本体部材4の両端にそれぞれ本体部材4とは別部材の一対の端部材5を有する。【選択図】図1