Vehicle lamp

The present invention relates to a vehicle lamp having a lamp body and a front lens which are integrally formed by blow molding into a lamp chamber as a hollow body lens unit. More particularly, the invention relates to a vehicle lamp whose lens portion in a body lens unit is provided with diffusion steps. A vehicle lamp having a hollow body lens unit constructed by integrally forming a lamp body and a front lens which constitute a lamp chamber, a light source provided in the body lens unit, and a diffusion step such as a cylindrical step having step elements, each of which has constant directivity, the diffusion step being provided on the outer surface of the lens portion of the body lens unit. The step elements of the diffusion step on the outer surface of the lens portion are lined up in a predetermined direction and each have directivity, so that the mud and dust do not easily stick to each step element.