A photocurable silicone composition comprising: (A) 100 parts by mass of an organopolysiloxane represented by the following average composition formula: R 1 a R 2 b SiO (4-a-b)/2 wherein, R 1 is an alkenyl group having from 2 to 12 carbons, R 2 is an alkyl group having from 1 to 12 carbons, an aryl group having from 6 to 12 carbons, or an aralkyl group having from 7 to 12 carbons; provided that, at least 30 mol% of R 2 in a molecule are the aryl groups or the aralkyl groups; and "a" and "b" are positive numbers satisfying: 1 ≤ a + b ≤ 2.5 and 0.001 ≤ a/(a + b) ≤ 0.2; (B) a compound having at least two thiol groups in a molecule, in an amount that the amount of the thiol groups in the present component is in a range of from 0.2 to 2.0 mol per 1 mol of the total alkenyl groups in component (A); (C) from 0.01 to 5 parts by mass of a photoradical initiator having a phosphorus atom; and (D) from 0.001 to 2 parts by mass of a hydroxyphenyl triazine compound represented by the following general formula: wherein, R 31 , R 32 , R 33 , R 34 , R 35 , R 36 and R 37 are the same or different, and are groups selected from hydrogen atoms, hydroxy groups or alkyl groups having from 1 to 12 carbons, R 4 is a linear or branched alkyl group having from 6 to 12 carbons or a group represented by the following general formula: -CH 2 CH(OH)CH 2 OR 5 wherein, R 5 is a linear or branched alkyl group having from 6 to 20 carbons. (A) 100 parts by mass of an organopolysiloxane represented by the following average composition formula: R 1 a R 2 b SiO (4-a-b)/2 wherein, R 1 is an alkenyl group having from 2 to 12 carbons, R 2 is an alkyl group having from 1 to 12 carbons, an aryl group having from 6 to 12 carbons, or an aralkyl group having from 7 to 12 carbons; provided that, at least 30 mol% of R 2 in a molecule are the aryl groups or the aralkyl groups; and "a" and "b" are positive numbers satisfying: 1 ≤ a + b ≤ 2.5 and 0.001 ≤ a/(a + b) ≤ 0.2; (B) a compound having at least two thiol groups in a molecule, in an amount that the amount of the thiol groups in the present component is in a range of from 0.2 to 2.0 mol per 1 mol of the total alkenyl groups in component (A); (C) from 0.01 to 5 parts by mass of a photoradical initiator having a phosphorus atom; and (D) from 0.001 to 2 parts by mass of a hydroxyphenyl triazine compound represented by the following general formula: wherein, R 31 , R 32 , R 33 , R 34 , R 35 , R 36 and R 37 are the same or different, and are groups selected from hydrogen atoms, hydroxy groups or alkyl groups having from 1 to 12 carbons, R 4 is a linear or branched alkyl group having from 6 to 12 carbons or a group represented by the following general formula: -CH 2 CH(OH)CH 2 OR 5 wherein, R 5 is a linear or branched alkyl group having from 6 to 20 carbons. wherein, R 31 , R 32 , R 33 , R 34 , R 35 , R 36 and R 37 are the same or different, and are groups selected from hydrogen atoms, hydroxy groups or alkyl groups having from 1 to 12 carbons, R 4 is a linear or branched alkyl group having from 6 to 12 carbons or a group represented by the following general formula: -CH 2 CH(OH)CH 2 OR 5 wherein, R 5 is a linear or branched alkyl group having from 6 to 20 carbons. <EOS>