Circuit board fixing structure and light irradiation device having same

A light irradiation device comprising:

• a circuit board fixing structure configured to fix a circuit board onto a surface of a base;
• and
• multiple light emitting elements disposed on the circuit board,
• wherein the circuit board fixing structure comprises,
• a wire pattern formed on a surface of the circuit board;
• a first through hole penetrating from a front surface to a rear surface of the circuit board;
• a second through hole penetrating from a front surface to a rear surface of the base so as to communicate with the first through hole;
• an electrode penetratively inserted into the second through hole;
• and
• a fixing member engaged with the electrode mounted on the surface of the circuit board and configured to fix the circuit board to the base, wherein when the fixing member and the electrode are engaged, the wire pattern and the electrode are electrically connected through the fixing member;
• wherein, when the electrode is mounted in the second through hole, a tip of the electrode is positioned on substantially a same plane as the front surface of the base, and a base end of the electrode is disposed to protrude from the rear surface of the base.