A vehicle lamp includes a convex lens and a light emitting device. Light directly reaching a rear surface of the convex lens from the light emitting device is deflected through the convex lens to form a light distribution pattern having a horizontal cutoff line and an oblique cutoff line. The light emitting device includes a light emitting chip having a rectangular light emitting surface oriented to face the rear surface of the convex lens, and a corner of the rectangular light emitting surface is disposed on a rear focal point of the convex lens. A front surface of the convex lens includes a horizontally diffusing region which diffuses a part of the light in the horizontal direction, and an obliquely diffusing region which diffuses another part of the light toward the self lane side in an oblique direction forming an upward angle with respect to the horizontal plane.