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摘要A sterilization module including a main body, a circuit board disposed in the main body, a light source disposed on the circuit board to emit sterilizing light, and a transparent unit to protect the light source from an outside and including a material that transmits the sterilizing light, in which the light source includes a mesa including a first semiconductor layer, an active layer, and a second semiconductor layer, a first electrode electrically connected to the first semiconductor layer, and a second electrode disposed on the second semiconductor layer and electrically connected to the second semiconductor layer, in which the first electrode includes a first contact region disposed on the outer area of the first semiconductor layer and a second contact region at least partially surrounded by the mesa, and a distance between the transparent unit and the circuit board is greater than a height of the light source.