The present invention discloses a light emitting diode (LED) light bar structure having heat dissipation function, adapted for a backlight module, and including a heat dissipation body, a plurality of light emitting diodes (LEDs), and a circuit board. The heat dissipation body has a circuit board insertion slot and is provided with a plurality of installation holes in row. The installation holes pass through the heat dissipation body, the LEDs are embedded in respective installation holes, and the circuit board is received in the circuit board insertion slot whereby the LEDs are fixed in the installations holes and electrically connect the circuit board. Accordingly, the LED light bar structure not only simplifies assembling procedures but also directly and laterally dissipate heat generated by the LEDs through a tight engagement of the LEDs and the heat dissipation body, thereby improving dissipation efficiency of the backlight module.