A vehicle interior component, having rigidity for mitigating an impact from a side collision, includes a door panel, a door trim adapted to be attached to the door panel, and a box-shaped protector arranged between the door panel and the door trim and attached to one of the door panel and the door trim. An outer wall groove extending in a vehicle front to back direction is formed in an outer wall of the protector, which is opposite to the other of the door panel and the door trim. The outer wall is partitioned by the outer wall groove in an up to down direction into an upper opposite surface and a lower opposite surface, and one of the upper opposite surface and the lower opposite surface has an up-down length at a vehicle front side, which is larger than an up-down length at a vehicle rear side.