A subject is to provide a reflector 12 for use in a light emitting device 10, and a light emitting device 10 using the same, which are capable of significantly improving a uniformity ratio of light intensity on an irradiation target surface A when light emitted from a plurality of directional light sources 26a, 26b is reflected thereon.
To solve the above subject, micro reflector segments 29 are protruded from a concave reflecting surface 20 of the reflector 12 in multiple stages and in multiple radial columns, the micro reflector segments each having a convex curved surface 29a which is defined by a locus of a circular arc moved in parallel in a radial direction of the concave reflecting surface 20; and a radius R of the convex curved surface 29a is set, in each of the reflection regions S1, S2, to be smaller when the convex curved surface 29a is positioned closer to a point P on which light emitted from each of the directional light sources 26a, 26b and traveling on the light axis L is incident, and is set to be larger when the convex curved surface is positioned more distant from the point P.