Illumination device, display device, and television reception device

An illumination device, comprising:

• a housing member that has a bottom plate, side walls that rise from the bottom plate, and a pair of protrusions disposed on inner sides of the side walls, the pair of protrusions protruding from a plate surface of the bottom plate to face each other, the pair of protrusions respectively having recessed surfaces that face each other;
• a light guide plate that is a plate-shaped member having a pair of first end faces extending in one direction, and a pair of second end faces extending in a direction perpendicular to the first end faces, the light guide plate having, on the respective first end faces, a pair of projections projecting outwardly from the respective end faces, the light guide plate being disposed inside the side walls such that a rear surface thereof faces the bottom plate and such that the respective projections engage the recessed surfaces of the protrusions;
• a light source unit having light sources and a light source substrate on which the light sources are mounted, the light source unit being disposed in the housing member such that the light sources face at least one of the second end faces of the light guide plate;
• and
• a frame having a frame-shaped covering plate that covers outer edges of a plate surface of the light guide plate, the frame further having pressing parts that extend downward from the covering plate so as to selectively press respective surfaces of the projections.