To provide a separator fixing structure of a vehicle lamp capable of preventing deformation and melting damage of a separator caused by heat and stably performing desired cut-off control by improving a luminous flux utilization factor of a light source.

There is provided a fixing structure of a separator 14 of a vehicle lamp provided with the separator 14 which individually divides light from an LED 13, the separator being arranged near a front of the LED (light source) 13. A positioning hole 14d is formed at the center in a width direction of the separator 14, a positioning pin 14A is installed protrusively in a heat sink (fixing member) 11 for fixing the separator 14, and the separator 14 is positioned against the heat sink 11 by inserting the positioning pin 14A in the positioning hole 14d of the separator 14, and further, both end parts in the width direction of the separator 14 are held to the heat sink 11 by holders 15.