To attain display having excellent display quality by restraining luminance unevenness.

A lighting device includes a plurality of light-emitting units for mounting a plurality of light-emitting elements on the same axis of boards, linear light sources in which the plurality of light-emitting units are arranged in a line state, a light guide wherein its end are arranged to be opposite to the linear light sources, and reflection sheets for reflecting light irradiated from the linear light sources. Reflection covers are arranged on the light guide side of joints caused among the boards of the plurality of light-emitting units.