A reflection type liquid-crystal in which a light guide plate is in tight contact with a liquid-crystal display element having a reflecting layer through a bonding layer with refractive index in a range of from 1.40 to 1.55 and whole light transmittivity in a range of not less than 90%, the light guide plate being designed so that incident light from an incidence side surface is emitted from a lower surface through prismatic irregularities formed on an upper surface, and the light emitted from the lower surface takes maximum intensity at an angle of 30 degrees or less with respect to a normal to a plane of the lower surface, while maximum intensity of leakage light from the upper surface at that angle is not larger than 1/5 of the maximum intensity in the lower surface, and incident light from the lower surface is transmitted from the upper surface.