Disclosed is a method for manufacturing a fluorescent material. The method includes: putting the fluorescent material into a first solution, and agitating the fluorescent material and the first solution; putting a nano fluorescent material having a nano size into the first solution, and agitating the nano fluorescent material having a nano size and the first solution; and separating supernatant from the first solution including the fluorescent material, and drying the fluorescent material. Disclosed is a light emitting device. The light emitting device includes: a body; a light emitting element mounted on a cavity formed in the body; a resin formed in the cavity; and a fluorescent material added to the resin, wherein a nano fluorescent material having a nano size is adsorbed in the fluorescent material.