Light emitting device and illuminating device

An illuminating device in which stray lights are prevented and light distribution design is easy by making it possible to receive lights emitted from an LED lamp with an external reflecting mirror as much as possible is provided. A reflecting mirror having a concave reflecting surface reflecting an incident light, a light emitting element, and a lens molding a light emitting element therein and having a lens surface opposed to a light emitting surface of the light emitting element, the lens surface being in a slope shape with its central portion being projected to the light emitting element are included, and the reflecting surface of the reflecting mirror and the light emitting surface of the light emitting element are disposed to be opposed to each other with the lens surface of the lens therebetween so that light emitted from the light emitting element is reflected at the lens surface to be emitted outside the lens to be incident on the reflecting surface of the reflecting mirror.