A resin composition comprising an isocyanurate ring-containing urethane (meth)acrylate compound A, an isocyanuratering-containingtri(meth)acrylatecompoundB, and a triazine ultraviolet light absorber C, wherein the isocyanurate ring-containing urethane (meth)acrylate compound A contains a compound A-1 represented by the formula, and the isocyanurate ring-containing tri(meth)acrylate compound B contains a compound B-1 represented by the formula: wherein, in the formula, each of R 1, R 2, and R 3 independently represents a group represented by the formula (1-a) or formula (1-b): wherein, in the formula (1-a), n1 represents an integer of 2 to 4, R 4 represents a hydrogen atom or a methyl group, and each of Q 1 and Q 2 independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms in the repeating unit, and at least one of Q 1 and Q 2 is an alkyl group, wherein, in the formula, each of R 5, R 6, and R 7 independently represents a group represented by the following formula (2-a): wherein, in the formula (2-a), n2 represents an integer of 2 to 4, R 8 represents a hydrogen atom or a methyl group, and each of Q 3 and Q 4 independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms in the repeating unit, wherein the isocyanurate ring-containing urethane (meth) acrylate compound A further contains a compound A-2 represented by the following formula: wherein, in the formula, n3 represents an integer of 2 to 9, each of R 9 and R 10 independently represents a hydrogen atom or an alkyl group having 1 to 7 carbon atoms in the repeating unit, and each of X 1 and X 2 independently represents a group represented by the following formula (3-a): wherein, in the formula (3-a), each of R 11 and R 12 independently represents a group represented by the formula (1-a) or formula (1-b) above. wherein the isocyanurate ring-containing urethane (meth)acrylate compound A contains a compound A-1 represented by the formula, and the isocyanurate ring-containing tri(meth)acrylate compound B contains a compound B-1 represented by the formula: wherein, in the formula, each of R 1, R 2, and R 3 independently represents a group represented by the formula (1-a) or formula (1-b): wherein, in the formula (1-a), n1 represents an integer of 2 to 4, R 4 represents a hydrogen atom or a methyl group, and each of Q 1 and Q 2 independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms in the repeating unit, and at least one of Q 1 and Q 2 is an alkyl group, wherein, in the formula, each of R 5, R 6, and R 7 independently represents a group represented by the following formula (2-a): wherein, in the formula (2-a), n2 represents an integer of 2 to 4, R 8 represents a hydrogen atom or a methyl group, and each of Q 3 and Q 4 independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms in the repeating unit, wherein the isocyanurate ring-containing urethane (meth) acrylate compound A further contains a compound A-2 represented by the following formula: wherein, in the formula, n3 represents an integer of 2 to 9, each of R 9 and R 10 independently represents a hydrogen atom or an alkyl group having 1 to 7 carbon atoms in the repeating unit, and each of X 1 and X 2 independently represents a group represented by the following formula (3-a): wherein, in the formula (3-a), each of R 11 and R 12 independently represents a group represented by the formula (1-a) or formula (1-b) above.