A light emitting device, comprising: a package which is formed of a resin and has a recess which is provided with a bottom face and two pairs of opposite inner walls surrounding the bottom face, the package having two pairs of opposite side walls made of the inner walls and corresponding outer walls; a lead frame exposed at the bottom face; a light emitting element which is provided on the lead frame; and a sealing resin provided in the recess for sealing the light emitting element, wherein the lead frame has a bottom plate portion and a reflector portion exposed along one of the pair of opposite inner walls, and a first angle between the reflector portion and the bottom face is greater than a second angle between another one of the pair of opposite inner walls which is opposite to the reflector portion and the bottom face, is provided.