A coating composition contains (A) an acrylate component and (B) a metal oxide. A mass ratio (B)/(A) is from 0.6 to 1.3, (A) contains the components (a-1), (a-2) and (a-3), and a content ratio X of (a-1), a content ratio Y of (a-2) and a content ratio Z of (a-3) satisfies the conditions (1) and (2): (a-1): a polyfunctional acrylate compound having 3 or more acrylate groups in one molecule; (a-2): a dendritic aliphatic compound having an acrylate group at an end thereof; and (a-3): a modified acrylate compound having been modified with an alkylene oxide or ε-caprolactone. The condition (1): in (A), X is from 40 to 60% by mass, and a total of Y and Z is from 60 to 40% by mass, and the condition (2): in the total of Y and Z, Z is 30% by mass or more and less than 100% by mass.