A stereoscopic image display includes: a display device that time-division displays left-eye image data and right-eye image data; shutter glasses comprising a left-eye shutter and a right-eye shutter alternately turned on and off in synchronization with the display device; and a backlight unit that irradiates light to the display device and is periodically turned on and off such that the backlight unit is turned on when a predetermined time determined according to a response time of liquid crystal lapses from a start point of a frame period.