The invention relates to a light emitting device (100), which comprises at least two LED (light emitting diode) chips (1), a heat radiator (2), a driver (3) and a metal heat guide structure (4), wherein one side of the heat radiator (2) is used for supporting the LED chips (1), the other side of the heat radiator (2) is provided with an accommodating cavity which is used for accommodating the driver (3), the metal heat guide structure (4) is arranged on an assembling surface (21) of the heat radiator (2), and the LED chips (3) are electrically connected with the metal heat guide structure (4) and are in contact with the metal heat guide structure (4) in a heat conduction way. The light emitting device has the advantages that the heat radiating performance is excellent, and the manufacturing difficulty and the production cost are reduced.