Curable resin composition

A curable resin composition comprising an epoxy resin (A), blocked urethane (C), and an amine-based latent curing agent (D),

• wherein the blocked urethane (C) is obtained by reacting a urethane polymer having a terminal isocyanate group with a blocking agent (C-4), the urethane polymer being obtained by reacting a polyisocyanate (C-1), a diol (C-2), and a branching agent (C-3) containing at least three groups that react with an isocyanate group,
• the ratio (number of NCO groups/number of NCO reactive groups) between the number of moles of isocyanate groups in the component (C-1) (number of NCO groups) and the total number of moles of hydroxyl groups in the component (C-2) and groups that react with an isocyanate group in the component (C-3) (number of NCO reactive groups) is from 1.4 to 1.6, and
• the proportion of the number of moles of groups that react with an isocyanate group in the component (C-3) is from 10 to 41% of the total number of moles of hydroxyl groups in the component (C-2) and groups that react with an isocyanate group in the component (C-3), and
• wherein the component (C-3) is at least one member selected from the group consisting of a propylene oxide adduct of glycerin and a propylene oxide adduct of trimethylolpropane.