Light emitting device and vehicle lamp

A light emitting device comprising:

• a planar light emitting body configured to emit light in a planar shape;
• and
• a transparent member configured to control the light from the planar light emitting body, the transparent member having a light incidence surface and a light emission surface, the light incidence surface arranged so as to face a light emitting surface of the planar light emitting body and configured to cause the light from the planar light emitting body to be incident on the transparent member, the light emission surface configured to emit, to the outside, the light which is propagated in the transparent member,
• wherein the transparent member is formed so as to extend in a predetermined direction and formed such that a distance between the light incidence surface and the light emission surface changes in accordance with a position in the predetermined direction.