Resin composition

A resin composition comprising an epoxy compound denoted by the formula (1):

• wherein Ar1, Ar2 and Ar3 are the same or different and each denotes any one of divalent groups denoted by the following formulas:
• wherein R denotes a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, a denotes an integer of 1 to 8, b, e and g denote an integer of 1 to 6, c denotes an integer of 1 to 7, d and h denote an integer of 1 to 4, f denotes an integer of 1 to 5, and when a to h denote an integer of 2 or more, all of R may be the same group or different groups;
• R1, R2 and R3 are the same or different and each denotes a hydrogen atom or an alkyl group having 1 to 8 carbon atoms;
• Q1 denotes a straight-chain alkylene group having 1 to 8 carbon atoms, wherein methylene groups composing said straight-chain alkylene group are optionally substituted with an alkyl group having 1 to 8 carbon atoms and —O— or —N(R4)— is optionally inserted between the methylene groups, wherein R4 denotes a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and an epoxy compound denoted by the formula (2):
• wherein R5 denotes a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, Q2 denotes a single bond or a straight-chain alkylene group having 1 to 8 carbon atoms, wherein methylene groups composing said straight-chain alkylene group are optionally substituted with an alkyl group having 1 to 8 carbon atoms.