Backlight and display apparatus

A backlight comprising:

• a light guide plate having a first main surface being an emission surface and a second main surface that is opposite to the first main surface;
• an optical member disposed to face the light guide plate, the optical member having a sheet-like shape;
• and
• a frame configured to enclose the light guide plate and the optical member, the frame including
• a rear frame provided on a side of the light guide plate corresponding to the second main surface,
• a front frame provided on a side of the light guide plate corresponding to the first main surface, and
• a middle frame provided between the rear frame and the front frame and disposed on a portion of the optical member, wherein
• a first hole is provided to pass through the frame in a direction in which the light guide plate and the optical member face each other,
• a cutout or a hole aligned to a position of the first hole of the frame is provided in each of the light guide plate and the optical member, and
• the backlight further comprises an adhesive agent, the adhesive agent being disposed in the first hole of the frame and in a space which communicates with the first hole and includes the cutout or the hole of each of the light guide plate and the optical member, the adhesive agent being configured to fix the light guide plate and the optical member.