A curable silicone composition comprising: 100 parts by mass of an organopolysiloxane resin having at least two alkenyl groups in a molecule and represented by the average unit formula: (R 1 R 2 2 SiO 1/2) a (R 3 2 SiO 2/2) b (R 4 SiO 3/2) c wherein R 1 is an alkenyl group having from 2 to 12 carbons; R 2 are the same or different, and are each an alkyl group having from 1 to 12 carbons, an alkenyl group having from 2 to 12 carbons, an aryl group having from 6 to 20 carbons, or an aralkyl group having from 7 to 20 carbons; R 3 are the same or different, and are each an alkyl group having from 1 to 12 carbons, an alkenyl group having from 2 to 12 carbons, or a phenyl group; R 4 is an aryl group having from 6 to 20 carbons or an aralkyl group having from 7 to 20 carbons; and a, b, and c are numbers that satisfy such that 0.01 ≤ a ≤ 0.5, 0 ≤ b ≤ 0.7, 0.1 ≤ c < 0.9, and a + b + c = 1; from 5 to 150 parts by mass of an organopolysiloxane represented by the general formula: wherein R 1 is synonymous with that described; R 5 are the same or different, and are each an alkyl group having from 1 to 12 carbon atoms or a phenyl group; R 6 is an alkyl group having from 1 to 12 carbon atoms; and m is an integer from 1 to 100, n is an integer from 0 to 50, where m ≥ n and 1 ≤ m + n ≤ 100; an organosiloxane (C 1) represented by the general formula: HR 5 R 6 SiO(R 5 2 SiO) p SiR 5 R 6 H wherein R 5 and R 6 are synonymous with those above; and p is an integer from 0 to 100; an organopolysiloxane (C 2) having at least two silicon-bonded hydrogen atoms in a molecule and represented by the average unit formula: (HR 5 R 6 SiO 1/2) d (HR 6 2 SiO 1/2) e (R 5 2 SiO 2/2) f (R 4 SiO 3/2) g wherein R 4, R 5, and R 6 are synonymous with those described above; and d, e, f, and g are numbers that satisfy such that 0.01 ≤ d ≤ 0.7, 0 ≤ e ≤ 0.5, 0 ≤ f ≤ 0.7, 0.1 ≤ g < 0.9, and d + e + f + g = 1; or a mixture of components (C 1) and (C 2), in an amount such that the number of silicon-bonded hydrogen atoms in the present component is from 0.1 to 5 moles per 1 mol of total alkenyl groups in components and; and an effective amount of a hydrosilylation reaction catalyst. 100 parts by mass of an organopolysiloxane resin having at least two alkenyl groups in a molecule and represented by the average unit formula: (R 1 R 2 2 SiO 1/2) a (R 3 2 SiO 2/2) b (R 4 SiO 3/2) c wherein R 1 is an alkenyl group having from 2 to 12 carbons; R 2 are the same or different, and are each an alkyl group having from 1 to 12 carbons, an alkenyl group having from 2 to 12 carbons, an aryl group having from 6 to 20 carbons, or an aralkyl group having from 7 to 20 carbons; R 3 are the same or different, and are each an alkyl group having from 1 to 12 carbons, an alkenyl group having from 2 to 12 carbons, or a phenyl group; R 4 is an aryl group having from 6 to 20 carbons or an aralkyl group having from 7 to 20 carbons; and a, b, and c are numbers that satisfy such that 0.01 ≤ a ≤ 0.5, 0 ≤ b ≤ 0.7, 0.1 ≤ c < 0.9, and a + b + c = 1; from 5 to 150 parts by mass of an organopolysiloxane represented by the general formula: wherein R 1 is synonymous with that described; R 5 are the same or different, and are each an alkyl group having from 1 to 12 carbon atoms or a phenyl group; R 6 is an alkyl group having from 1 to 12 carbon atoms; and m is an integer from 1 to 100, n is an integer from 0 to 50, where m ≥ n and 1 ≤ m + n ≤ 100; an organosiloxane (C 1) represented by the general formula: HR 5 R 6 SiO(R 5 2 SiO) p SiR 5 R 6 H wherein R 5 and R 6 are synonymous with those above; and p is an integer from 0 to 100; an organopolysiloxane (C 2) having at least two silicon-bonded hydrogen atoms in a molecule and represented by the average unit formula: (HR 5 R 6 SiO 1/2) d (HR 6 2 SiO 1/2) e (R 5 2 SiO 2/2) f (R 4 SiO 3/2) g wherein R 4, R 5, and R 6 are synonymous with those described above; and d, e, f, and g are numbers that satisfy such that 0.01 ≤ d ≤ 0.7, 0 ≤ e ≤ 0.5, 0 ≤ f ≤ 0.7, 0.1 ≤ g < 0.9, and d + e + f + g = 1; or a mixture of components (C 1) and (C 2), in an amount such that the number of silicon-bonded hydrogen atoms in the present component is from 0.1 to 5 moles per 1 mol of total alkenyl groups in components and; and an effective amount of a hydrosilylation reaction catalyst.