PURPOSE: A traffic light is provided to rapidly remove foreign substances with an additional removing unit by comprising a detecting sensor and detecting the existence of the foreign substances on the traffic light. CONSTITUTION: A lamp part is formed in a traffic light case(200). An inner panel(400) is formed to be mounted in the traffic light case. The inner panel is connected to the traffic light case. A protection lens is installed inside the inner panel for protecting a lamp part. A reflecting shade reflects the light source of the lamp part. The reflecting shade surrounds the protection lens. A detection sensor is formed at the inner panel. The detection sensor is able to sense a foreign substance. The lamp part is accommodated by an accommodating part. A back end part(230) is protruded to the other side of the accommodating part.
