A light emitting device (10) has: a plurality of light emitting elements (1), a base (2) having a first main surface and a second main surface on the opposite side from the first main surface, the base (2) having conductive patterns (3a) disposed on the first main surface on which the light emitting elements (1) are mounted, conductive patterns (3b) disposed on the second main surface, and a groove (2a) provided on the second main surface of the base (2) corresponding to a space between the light emitting elements (1), and a light reflecting member (5) that integrally covers side surfaces (4a) of the plurality of light emitting elements (1).