Light source device and display device

A light source device, comprising:

• a circuit board having a light-emitting element mounted on a one surface;
• a support body positioned on the other surface side of the circuit board for supporting the circuit board;
• a rivet having a head portion which is positioned on a side of the one surface of the circuit board and cannot be inserted into a first through hole provided on the circuit board and the support body, and a shaft portion linked to the head portion and having a tip side stopped and held on the support body in a penetration via the first through hole;
• and
• a reflection sheet arranged on the one surface of the circuit board for reflecting light,
• wherein a lens for diffusing light of the light-emitting element is disposed apart from the circuit board, the rivet being provided to be adjacent to the lens,
• a second through hole having a diameter larger or smaller than the diameter of the head portion is provided at the position corresponding to the head portion on the reflection sheet, and
• the rivet is inserted from the one surface side of the circuit board into the second through hole provided on the reflection sheet.