NOVELTY - A curable resin composition comprises 100 parts mass of polyfunctional epoxy component (A), 25-200 parts mass of polyfunctional cyanic acid ester compound (B), and 0.5-20 parts mass of imidazole compound (C) used as hardener. The polyfunctional epoxy component (A) contains trifunctional epoxy compound (A1) having three glycidyl groups, and tetrafunctional epoxy compound (A2) having four glycidyl groups. The mass ratio ((A1):(A2)) of trifunctional epoxy compound (A1) and tetrafunctional epoxy compound (A2) is 10:90-90:10.    USE - Curable resin composition used for resin sheet (claimed). Uses include but are not limited to printed wiring board, semiconductor sealing insulating material, power semiconductor, light emission diode lighting, light emission diode backlight, power light emission diode, solar cell, and adhesive for heat emitting device, etc.    ADVANTAGE - The curable resin composition has excellent coating property, low tackability, flexibility, adhesiveness, heat resistance and insulation property.    DETAILED DESCRIPTION - A curable resin composition comprises 100 parts mass of polyfunctional epoxy component (A), 25-200 parts mass of polyfunctional cyanic acid ester compound (B), and 0.5-20 parts mass of imidazole compound (C) used as hardener. The polyfunctional epoxy component (A) contains trifunctional epoxy compound (A1) having three glycidyl groups, and tetrafunctional epoxy compound (A2) having four glycidyl groups. The mass ratio ((A1):(A2)) of trifunctional epoxy compound (A1) and tetrafunctional epoxy compound (A2) is 10:90-90:10. The polyfunctional cyanic acid ester compound (B) contains two or more cyanate groups. The trifunctional epoxy compound (A1) has bonds between the rings of aromatic hydrocarbon and three glycidyl groups, glycidyloxy group, one diglycidyl amine group, hydrocarbon with one or more aromatic rings, no methylene groups between the carbon atoms, ether bond, and halogen atom substituent or no substituent. The tetrafunctional epoxy compound (A2) has bonds between the rings of an aromatic hydrocarbon, glycidyloxy groups and diglycidyl amine groups, hydrocarbon with one or more aromatic rings, no methylene groups between the carbon atoms, ether bond, and halogen atom substituent or no substituent.