PURPOSE: A bulb holder bracket is provided to prevent easy deformation of a relay terminal by having a horizontal engagement type terminal. CONSTITUTION: A bulb holder bracket (400) penetrates a bulb holder (100) and is formed in a ring shape. The bulb holder bracket includes an outer surface, a bottom surface and a horizontal insertion unit. The outer surface is configured to face the outside. The bottom surface is to face a housing side and contacts the housing side. The horizontal insertion unit is formed over the outer surface and the bottom surface. A terminal (300) is inserted into the horizontal insertion unit along the bottom surface from the outer surface in the horizontal direction and is engaged with the horizontal insertion unit. The horizontal insertion unit is inserted and engaged with one operation when the terminal is sliding in the horizontal direction and is mounted.
