Liquid crystal composition and liquid crystal display device

A liquid crystal composition containing at least one compound selected from the group of compounds represented by formula (1) as a first component and at least one compound selected from the group of compounds represented by formula (2) as a second component:

• wherein R1, R2, R3 and R4 are independently hydrogen, hydroxy, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyl having 2 to 12 carbons in which arbitrary hydrogen is replaced by fluorine, or a polymerizable group, and at least one of R1, R2, R3 and R4 is a polymerizable group;
• R5 and R6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which arbitrary hydrogen is replaced by fluorine;
• ring A and ring C are independently 1,4-cyclohexylene, 1,4-phenylene in which arbitrary hydrogen may be replaced by fluorine or chlorine, or tetrahydropyran-2,5-diyl;
• ring B is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl;
• Z Z2, Z3 and Z4 are independently a single bond, oxygen, carbonyloxy, alkylene having 1 to 12 carbons or alkylene having 1 to 12 carbons in which arbitrary —CH2— is replaced by —O—;
• Z5 and Z6 are independently a single bond, or ethylene;
• m is 1, 2 or 3;
• and n is 0 or 1, and a sum of m and n is 3 or less.