Liquid crystal composition and liquid crystal display device

A liquid crystal composition having a nematic phase and comprising three components, wherein a first component is at least one compound selected from the group of compounds represented by formula (1), a second component is at least one compound selected from the group of compounds represented by formula (2), and a third component is at least one compound selected from the group of compounds represented by formula (3):

• wherein R1 and R2 are each independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons;
• R3 and R4 are each independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkoxymethyl having 2 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, ring B and ring C are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene or tetrahydropyran-2,5-diyl;
• X1, X2, X3 and X4 are each independently hydrogen or fluorine;
• Y1 is fluorine, chlorine or trifluoromethoxy;
• Z1 is independently a single bond, ethylene or carbonyloxy;
• and m is 0, 1 or 2.