According to one embodiment, a liquid crystal display device includes a first insulative substrate, a second insulative substrate, a first polarizer disposed on an outer surface side of the first insulative substrate, a second polarizer disposed on an outer surface side of the second insulative substrate, and a first retardation plate and a second retardation plate, which are stacked between the second insulative substrate and the second polarizer. When a retardation in the thickness direction, which is defined by ((nx+ny)/2−nz)*d, is Rth, the first retardation plate has a negative first retardation Rth1, the second retardation plate has a positive second retardation Rth2, and a contribution degree of the second retardation Rth2, which is defined by |Rth2|*100/(|Rth1|+|Rth2|), is 40%±3%.