A silicone gel composition comprising the following components, and, and which cures to provide a silicone gel cured product having a degree of penetration of 40 to 100 as specified by JIS K 2220 and a free oil content of 15% by weight or less as measured by the method specified in the description: 100 parts by weight of organopolysiloxane containing per molecule at least two alkenyl groups bonded to silicon atoms, comprising the following components (a-1) and component (a-2), provided that the weight ratio of component (a-1) in the component: (a-1)/{(a-1)+(a-2)} is 0.1 to 0.5; (a-1) branched organopolysiloxane represented by the following general formula, having per molecule at least three alkenyl groups bonded to silicon atoms only at molecular chain ends: (R 1 a R 2 3-a SiO1 /2) p (R 2 2 SiO) q (R 2 SiO 3/2) r wherein R 1 are identical or different alkenyl groups having 2 to 10 carbon atoms, R 2 are identical or different monovalent hydrocarbon groups having 1 to 10 carbon atoms, excluding aliphatic unsaturated groups, a is 1 or 2, p, q and r are respectively integers of 3 ≤ p, 50 ≤ q, 1 ≤ r ≤ 10, with r < p and 0.001 ≤ r/q ≤ 0.2, (a-2) linear organopolysiloxane represented by the following general formula, having per molecule at least two alkenyl groups bonded to silicon atoms only at both ends of the molecular chain: (R 1 a R 2 3-a SiO 1/2) 2 (R 2 2 SiO) s wherein R 1, R 2 and a are as mentioned above, and s is an integer of 10 to 1,000, linear organohydrogenpolysiloxane represented by the following average composition formula, containing per molecule at least two hydrogen atoms bonded to silicon atoms in an amount such that hydrogen atoms bonded to silicon atoms in the component are 0.8 to 2 mol per 1 mol of total alkenyl groups in component: (H b R 3 3-b SiO 1/2) t (HR 3 SiO) u (R 3 2 SiO) 1-t-u wherein R 3 are identical or different monovalent hydrocarbon groups having 1 to 10 carbon atoms, excluding aliphatic unsaturated groups, b is 1 or 2, t is a positive number of 0.001 to 0.3, and u is a number from 0 to 0.2, and an effective amount as a catalyst of platinum-based curing catalyst. 100 parts by weight of organopolysiloxane containing per molecule at least two alkenyl groups bonded to silicon atoms, comprising the following components (a-1) and component (a-2), provided that the weight ratio of component (a-1) in the component: (a-1)/{(a-1)+(a-2)} is 0.1 to 0.5; (a-1) branched organopolysiloxane represented by the following general formula, having per molecule at least three alkenyl groups bonded to silicon atoms only at molecular chain ends: (R 1 a R 2 3-a SiO1 /2) p (R 2 2 SiO) q (R 2 SiO 3/2) r wherein R 1 are identical or different alkenyl groups having 2 to 10 carbon atoms, R 2 are identical or different monovalent hydrocarbon groups having 1 to 10 carbon atoms, excluding aliphatic unsaturated groups, a is 1 or 2, p, q and r are respectively integers of 3 ≤ p, 50 ≤ q, 1 ≤ r ≤ 10, with r < p and 0.001 ≤ r/q ≤ 0.2, (a-2) linear organopolysiloxane represented by the following general formula, having per molecule at least two alkenyl groups bonded to silicon atoms only at both ends of the molecular chain: (R 1 a R 2 3-a SiO 1/2) 2 (R 2 2 SiO) s wherein R 1, R 2 and a are as mentioned above, and s is an integer of 10 to 1,000, (a-1) branched organopolysiloxane represented by the following general formula, having per molecule at least three alkenyl groups bonded to silicon atoms only at molecular chain ends: (R 1 a R 2 3-a SiO1 /2) p (R 2 2 SiO) q (R 2 SiO 3/2) r wherein R 1 are identical or different alkenyl groups having 2 to 10 carbon atoms, R 2 are identical or different monovalent hydrocarbon groups having 1 to 10 carbon atoms, excluding aliphatic unsaturated groups, a is 1 or 2, p, q and r are respectively integers of 3 ≤ p, 50 ≤ q, 1 ≤ r ≤ 10, with r < p and 0.001 ≤ r/q ≤ 0.2, (a-2) linear organopolysiloxane represented by the following general formula, having per molecule at least two alkenyl groups bonded to silicon atoms only at both ends of the molecular chain: (R 1 a R 2 3-a SiO 1/2) 2 (R 2 2 SiO) s wherein R 1, R 2 and a are as mentioned above, and s is an integer of 10 to 1,000, linear organohydrogenpolysiloxane represented by the following average composition formula, containing per molecule at least two hydrogen atoms bonded to silicon atoms in an amount such that hydrogen atoms bonded to silicon atoms in the component are 0.8 to 2 mol per 1 mol of total alkenyl groups in component: (H b R 3 3-b SiO 1/2) t (HR 3 SiO) u (R 3 2 SiO) 1-t-u wherein R 3 are identical or different monovalent hydrocarbon groups having 1 to 10 carbon atoms, excluding aliphatic unsaturated groups, b is 1 or 2, t is a positive number of 0.001 to 0.3, and u is a number from 0 to 0.2, and an effective amount as a catalyst of platinum-based curing catalyst.