Disclosed are a backlight unit and a display device using the same. The backlight unit includes a light guide plate, a light emitting module provided on at least one lateral surface of the light guide plate to supply light to the light guide plate, and a bottom cover to contain the light guide plate and the light emitting module. The light emitting module includes a substrate including a plurality of through holes and a plurality of light emitting devices which are inserted into the through holes and spaced apart from the light guide plate at a first distance.