A liquid curable silicone rubber composition comprising the following components of,, and: 100 parts by weight of an organopolysiloxane having one or more silicon atom-bonded alkenyl groups on average in one molecule, composed of Component (A-1) and Component (A-2), wherein Component (A-1) is an organopolysiloxane having at least two alkenyl groups in one molecule, in which the content of the alkenyl group ranges from 0.02 to 1.9% by weight, and Component (A-2) is an organopolysiloxane having at least two alkenyl groups in one molecule, in which the content of the alkenyl group ranges from 8 to 50% by weight, (B-1) an organohydrogenpolysiloxane having at least three silicon atom-bonded hydrogen atoms in one molecule, wherein at least one of the hydrogen atoms is present as a siloxane unit represented by the formula of R 1 HSiO 2/2 (wherein R 1 represents a non-substituted or substituted monovalent hydrocarbon group containing no aliphatic unsaturated bond) in the molecule and (B-2) a linear organohydrogenpolysiloxane having one silicon atom-bonded hydrogen atom only at each of both terminals of the molecular chain and having no aliphatic unsaturated bond(s) in a molecule, [provided that the blending amount of component (B-1) and component (B-2) is an amount such that the molar ratio of silicon atom-bonded hydrogen atoms contained in component (B-1) and component (B-2): alkenyl groups contained in component ranges from (0.8:1.0) to (2.5:1.0), and the total number of silicon atom-bonded hydrogen atoms contained in component (B-2) is 70 to 100% of the total number of silicon atom-bonded hydrogen atoms contained in component (B-1) and component (B-2); provided that when the aforementioned numerical value is 100%, component consists only of (B-2).] an amount of a hydrosilylation reaction catalyst necessary to cure the present composition, and 0.1 to 50 parts by weight of a reinforcing silica fine powder. 100 parts by weight of an organopolysiloxane having one or more silicon atom-bonded alkenyl groups on average in one molecule, composed of Component (A-1) and Component (A-2), wherein Component (A-1) is an organopolysiloxane having at least two alkenyl groups in one molecule, in which the content of the alkenyl group ranges from 0.02 to 1.9% by weight, and Component (A-2) is an organopolysiloxane having at least two alkenyl groups in one molecule, in which the content of the alkenyl group ranges from 8 to 50% by weight, wherein Component (A-1) is an organopolysiloxane having at least two alkenyl groups in one molecule, in which the content of the alkenyl group ranges from 0.02 to 1.9% by weight, and Component (A-2) is an organopolysiloxane having at least two alkenyl groups in one molecule, in which the content of the alkenyl group ranges from 8 to 50% by weight, (B-1) an organohydrogenpolysiloxane having at least three silicon atom-bonded hydrogen atoms in one molecule, wherein at least one of the hydrogen atoms is present as a siloxane unit represented by the formula of R 1 HSiO 2/2 (wherein R 1 represents a non-substituted or substituted monovalent hydrocarbon group containing no aliphatic unsaturated bond) in the molecule and (B-2) a linear organohydrogenpolysiloxane having one silicon atom-bonded hydrogen atom only at each of both terminals of the molecular chain and having no aliphatic unsaturated bond(s) in a molecule, [provided that the blending amount of component (B-1) and component (B-2) is an amount such that the molar ratio of silicon atom-bonded hydrogen atoms contained in component (B-1) and component (B-2): alkenyl groups contained in component ranges from (0.8:1.0) to (2.5:1.0), and the total number of silicon atom-bonded hydrogen atoms contained in component (B-2) is 70 to 100% of the total number of silicon atom-bonded hydrogen atoms contained in component (B-1) and component (B-2); provided that when the aforementioned numerical value is 100%, component consists only of (B-2).] (B-1) an organohydrogenpolysiloxane having at least three silicon atom-bonded hydrogen atoms in one molecule, wherein at least one of the hydrogen atoms is present as a siloxane unit represented by the formula of R 1 HSiO 2/2 (wherein R 1 represents a non-substituted or substituted monovalent hydrocarbon group containing no aliphatic unsaturated bond) in the molecule and (B-2) a linear organohydrogenpolysiloxane having one silicon atom-bonded hydrogen atom only at each of both terminals of the molecular chain and having no aliphatic unsaturated bond(s) in a molecule, [provided that the blending amount of component (B-1) and component (B-2) is an amount such that the molar ratio of silicon atom-bonded hydrogen atoms contained in component (B-1) and component (B-2): alkenyl groups contained in component ranges from (0.8:1.0) to (2.5:1.0), and the total number of silicon atom-bonded hydrogen atoms contained in component (B-2) is 70 to 100% of the total number of silicon atom-bonded hydrogen atoms contained in component (B-1) and component (B-2); provided that when the aforementioned numerical value is 100%, component consists only of (B-2).] an amount of a hydrosilylation reaction catalyst necessary to cure the present composition, and 0.1 to 50 parts by weight of a reinforcing silica fine powder.