The liquid crystal composition and a liquid crystal display device

The present invention provides a liquid crystal composition and a liquid crystal display device. The display element composition, temperature dependence and the natural pitch of the selective reflection wavelength temperature dependence is small, and the low-temperature storage stability, a wide liquid crystal temperature range is further provided a chiral nematic liquid crystal composition in a bistable liquid crystal, and using the liquid crystal composition of the bistable liquid crystal display element. The optically active compounds of the composition containing Formula (Ia) and formula (II-a) represented. (Formula (II-a) and formula (Ia) spiral in the same direction, the temperature characteristics of the natural pitch is positive, HTP is 3 or more.)