NOVELTY - An active energy ray-curable coating composition comprises (meth)acrylate oligomer as essential ingredient, and compound having ethylenically unsaturated group and hydrophilic group(s) as component (B1), and component (C1), or liquid-separated compound as component (B2) and component (C2) with respect to total amount of hardenable component. The component (C1) has an ethylenically unsaturated group. The components (C1) and (C2) exclude (meth)acrylate having (meth)acryloyl group and 4-20C alkyl group, alkenyl group, cycloalkyl group or cyclic alkenyl group in ester portion.    USE - Active energy ray-curable coating composition for manufacture of cured film-containing metallic substrate for lithium-ion battery (all claimed), plasma display panel and substrate circuit-protection material for electric-power-assisted bicycle.    ADVANTAGE - The active energy ray-curable coating composition provides cured film having excellent solvent resistance and excellent adhesion to metallic substrate.    DETAILED DESCRIPTION - An active energy ray-curable coating composition comprises 30-97 wt.% (meth)acrylate oligomer having a diene-based structure or a hydrogenated diene-based structure, and two or more (meth)acryloyl groups as component (A) as an essential ingredient, and 3-70 wt.% compound having an ethylenically unsaturated group and hydrophilic group(s) as component (B1) and 0-67 wt.% compound other than components (A) and (B1) as component (C1), or 3-70 wt.% liquid-separated compound having ethylenically unsaturated group(s), which is incompatible with n-hexane of same weight as component (B2) and 0-57 wt.% compound having an ethylenically unsaturated group as component (C2) with respect to total amount of hardenable component. The component (C2) is capable of mixing with n-hexane and the component (B2) of same weight. The component (C1) has an ethylenically unsaturated group. The components (C1) and (C2) exclude (meth)acrylate having (meth)acryloyl group and 4-20C alkyl group, alkenyl group, cycloalkyl group or cyclic alkenyl group in ester portion. INDEPENDENT CLAIMS are included for the following:    (1) cured film-containing metallic substrate, which has cured film of coating composition formed on metallic substrate surface; and    (2) manufacture of cured film-containing metallic substrate, which involves coating the coating composition on one portion or all portion of metallic substrate, irradiating the coated composition with an active energy ray, and curing.