A curable perfluoropolyether gel composition comprising a straight chain fluorine-containing polymer having at least two alkenyl groups per molecule, represented by the following formula: wherein R 1 is independently vinyl group or an alkyl group containing 1 to 4 carbon atoms, R 2 is an alkylene group containing 1 to 6 carbon atoms, R 3 is independently hydrogen atom or an alkyl group containing 1 to 4 carbon atoms optionally substituted with fluorine, and Rf 1 is a divalent perfluoropolyether structure-containing group, a polyfluoromonoalkenyl compound containing one alkenyl group per molecule and having a perfluoropolyether structure in its backbone, and represented by the following formula: Rf 2 -(X') p -CH=CH 2 wherein X' is -CH 2 -, -OCH 2 -, -CH 2 OCH 2 -, or -CO-NR 4 -Y'- wherein Y' is CH 2 -, a group (o-, m- or p-dimethylsilylphenylene group) represented by the following structural formula (Z'): or a group represented by the following structural formula (Z"): R 4 is hydrogen atom, methyl group, phenyl group, or allyl group; Rf 2 is a monovalent perfluoropolyether structure-containing group which is the group represented by the following formula: (C a F 2a O) q - wherein a is an integer of 1 to 6, and q is an integer of 20 to 600, and p is I, an organosilicon compound containing at least two hydrogen atoms bonded to the silicon atom per molecule, a hydrosilylation catalyst, at least one perfluoropolyether compound selected from the group consisting of the compounds represented by the following-general formulae to: A-O-(CF 2 CF 2 CF 2 O) d -A wherein A is a group represented by the formula: C e F 2e+1 - wherein e is an integer of 1 to 3, and d is an integer of 1 to 500; A-O-(CF 2 O) f -(CF 2 CF 2 O) h -A wherein A is as described above, and f and h are independently an integer of 1 to 300, and wherein A is as described above, and i and j are independently an integer of 1 to 300, a penetration of a cured product of the gel composition according to JIS K2220 or ASTM D-1403 is in the range of 1 to 200. a straight chain fluorine-containing polymer having at least two alkenyl groups per molecule, represented by the following formula: wherein R 1 is independently vinyl group or an alkyl group containing 1 to 4 carbon atoms, R 2 is an alkylene group containing 1 to 6 carbon atoms, R 3 is independently hydrogen atom or an alkyl group containing 1 to 4 carbon atoms optionally substituted with fluorine, and Rf 1 is a divalent perfluoropolyether structure-containing group, a polyfluoromonoalkenyl compound containing one alkenyl group per molecule and having a perfluoropolyether structure in its backbone, and represented by the following formula: Rf 2 -(X') p -CH=CH 2 wherein X' is -CH 2 -, -OCH 2 -, -CH 2 OCH 2 -, or -CO-NR 4 -Y'- wherein Y' is CH 2 -, a group (o-, m- or p-dimethylsilylphenylene group) represented by the following structural formula (Z'): or a group represented by the following structural formula (Z"): R 4 is hydrogen atom, methyl group, phenyl group, or allyl group; Rf 2 is a monovalent perfluoropolyether structure-containing group which is the group represented by the following formula: (C a F 2a O) q - wherein a is an integer of 1 to 6, and q is an integer of 20 to 600, and p is I, X' is -CH 2 -, -OCH 2 -, -CH 2 OCH 2 -, or -CO-NR 4 -Y'- wherein Y' is CH 2 -, a group (o-, m- or p-dimethylsilylphenylene group) represented by the following structural formula (Z'): or a group represented by the following structural formula (Z"): R 4 is hydrogen atom, methyl group, phenyl group, or allyl group; Rf 2 is a monovalent perfluoropolyether structure-containing group which is the group represented by the following formula: (C a F 2a O) q - wherein a is an integer of 1 to 6, and q is an integer of 20 to 600, and p is I, an organosilicon compound containing at least two hydrogen atoms bonded to the silicon atom per molecule, a hydrosilylation catalyst, at least one perfluoropolyether compound selected from the group consisting of the compounds represented by the following-general formulae to: A-O-(CF 2 CF 2 CF 2 O) d -A wherein A is a group represented by the formula: C e F 2e+1 - wherein e is an integer of 1 to 3, and d is an integer of 1 to 500; A-O-(CF 2 O) f -(CF 2 CF 2 O) h -A wherein A is as described above, and f and h are independently an integer of 1 to 300, and wherein A is as described above, and i and j are independently an integer of 1 to 300, a penetration of a cured product of the gel composition according to JIS K2220 or ASTM D-1403 is in the range of 1 to 200.