A liquid crystal composition that has a nematic phase and positive dielectric anisotropy, and contains at least one compound selected from the group of compounds represented by formula as an additive component, and at least one compound selected from the group of compounds represented by formula as a first component: wherein, in formula, R 1, R 2, R 3, R 4, R 5, R 6, R 7 and R 8 are independently hydrogen or alkyl having 1 to 4 carbons; ring A and ring B are independently cyclohexylene, cyclohexenylene, decahydronaphthalenediyl, dihydropyrandiyl, tetrahydropyrandiyl, dioxanediyl, phenylene, naphthalenediyl, pyrimidinediyl or pyridinediyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 5 carbons, alkoxy having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine; Z 1, Z 2 and Z 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of -CH 2 - may be replaced by -O-, -S-, -CO-, -COO-, -OCO- or -SiH 2 -, and at least one piece of -CH 2 -CH 2 - may be replaced by -CH=CH- or -C≡C-, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine; a and b are independently 1 or 2; c is 0, 1 or 2, and ring A when c is 0 is cyclohexenylene, decahydronaphthalenediyl, dihydropyrandiyl, tetrahydropyrandiyl, dioxanediyl, naphthalenediyl, pyrimidinediyl or pyridinediyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 5 carbons, alkoxy having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine; and in formula, R 9 and R 10 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine. wherein, in formula, R 1, R 2, R 3, R 4, R 5, R 6, R 7 and R 8 are independently hydrogen or alkyl having 1 to 4 carbons; ring A and ring B are independently cyclohexylene, cyclohexenylene, decahydronaphthalenediyl, dihydropyrandiyl, tetrahydropyrandiyl, dioxanediyl, phenylene, naphthalenediyl, pyrimidinediyl or pyridinediyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 5 carbons, alkoxy having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine; Z 1, Z 2 and Z 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of -CH 2 - may be replaced by -O-, -S-, -CO-, -COO-, -OCO- or -SiH 2 -, and at least one piece of -CH 2 -CH 2 - may be replaced by -CH=CH- or -C≡C-, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine; a and b are independently 1 or 2; c is 0, 1 or 2, and ring A when c is 0 is cyclohexenylene, decahydronaphthalenediyl, dihydropyrandiyl, tetrahydropyrandiyl, dioxanediyl, naphthalenediyl, pyrimidinediyl or pyridinediyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 5 carbons, alkoxy having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine; and in formula, R 9 and R 10 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.