An oxygen-curable silicone composition comprising: 100 parts by weight of an organopolysiloxane having the general formula described below: wherein R 1 each independently represents an alkyl group having 1 to 10 carbon atoms, alkenyl group having 2 to 10 carbon atoms, aryl group having 6 to 10 carbon atoms, acryloyloxy group, methacryloyloxy group, acryloyloxyalkyl group, methacryloyloxyalkyl group, acryloyloxyalkyloxy group, or methacryloyloxyalkyloxy group provided that one molecule of the organopolysiloxane includes at least one group selected from acryloyloxy group, methacryloyloxy group, acryloyloxyalkyl group, methacryloyloxyalkyl group, acryloyloxyalkyloxy group, and methacryloyloxyalkyloxy group, R 2 each independently represents an oxygen atom, alkylene group having 1 to 10 carbon atoms, or arylene group having 6 to 10 carbon atoms, and m and n represent numbers that are 0 or more and satisfy 1 ≤ m + n ≤ 1,000; 1 to 1,000 parts by weight of a silicone resin including (a) a unit having the formula described below, (b) an R 1 3 SiO 1/2 unit, and (c) a SiO 4/2 unit as constitutive units, having a molar ratio of a total of the unit (a) and the unit (b) to the unit (c) in a range of 0.4 to 1.2, and having, per 100 g, 0.005 mol or more of a Si-OH group: wherein R 1 and R 2 are as described above, R 3 each independently represents an acryloyloxyalkyl group, methacryloyloxyalkyl group, acryloyloxyalkyloxy group, or methacryloyloxyalkyloxy group, p represents a number satisfying 0 ≤ p ≤ 10, and a represents a number satisfying 1 ≤ a ≤ 3; and 0.01 to 20 parts by weight of an organoborane complex having the formula described below: wherein R 4 each independently represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, R 5 and R 6 each independently represent a monovalent hydrocarbon group having 1 to 10 carbon atoms, and R 5 and R 6 may bond to form a divalent linking group. 100 parts by weight of an organopolysiloxane having the general formula described below: wherein R 1 each independently represents an alkyl group having 1 to 10 carbon atoms, alkenyl group having 2 to 10 carbon atoms, aryl group having 6 to 10 carbon atoms, acryloyloxy group, methacryloyloxy group, acryloyloxyalkyl group, methacryloyloxyalkyl group, acryloyloxyalkyloxy group, or methacryloyloxyalkyloxy group provided that one molecule of the organopolysiloxane includes at least one group selected from acryloyloxy group, methacryloyloxy group, acryloyloxyalkyl group, methacryloyloxyalkyl group, acryloyloxyalkyloxy group, and methacryloyloxyalkyloxy group, R 2 each independently represents an oxygen atom, alkylene group having 1 to 10 carbon atoms, or arylene group having 6 to 10 carbon atoms, and m and n represent numbers that are 0 or more and satisfy 1 ≤ m + n ≤ 1,000; 1 to 1,000 parts by weight of a silicone resin including (a) a unit having the formula described below, (b) an R 1 3 SiO 1/2 unit, and (c) a SiO 4/2 unit as constitutive units, having a molar ratio of a total of the unit (a) and the unit (b) to the unit (c) in a range of 0.4 to 1.2, and having, per 100 g, 0.005 mol or more of a Si-OH group: wherein R 1 and R 2 are as described above, R 3 each independently represents an acryloyloxyalkyl group, methacryloyloxyalkyl group, acryloyloxyalkyloxy group, or methacryloyloxyalkyloxy group, p represents a number satisfying 0 ≤ p ≤ 10, and a represents a number satisfying 1 ≤ a ≤ 3; and 0.01 to 20 parts by weight of an organoborane complex having the formula described below: wherein R 4 each independently represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, R 5 and R 6 each independently represent a monovalent hydrocarbon group having 1 to 10 carbon atoms, and R 5 and R 6 may bond to form a divalent linking group.