A vehicle lighting device includes a case, a lens, a light guide, a waterproof member, hooks, and catches. The catches are elastically deformed outward to separate from an accommodation portion so that the hooks enter the catches from the side closer to the accommodation portion. Engaging surfaces of the hooks engage with catch surfaces of the catches so that the case and the lens are joined. The joining causes the waterproof member to be compressed. The engaging surfaces and the catch surfaces are inclined by an equal angle relative to an imaginary plane perpendicular to the arrangement direction of the case and the lens such that the catch surfaces are located inward of the engaging surfaces and close to the accommodation portion.