An external heat insulation panel according to the present invention comprises: a heat insulation panel which is fixed to the wall of a building and which comprises a heat insulation material; and an exterior panel which covers the heat insulation panel and which has a base panel coupled to the front surface of the heat insulation panel, and a waterproof layer formed on the front surface of the base panel, wherein a coupling groove is provided in one of the heat insulation panel and the exterior panel, and the other has a coupling protrusion so as to be inserted into and coupled with the coupling groove when the heat insulation panel and the exterior panel are coupled. The external heat insulation panel according to the present invention has a simple structure and can be manufactured at lower cost. In addition, the external heat insulation panel is light in weight and has a simple structure for fixing to a wall, which enables simple construction at lower cost, and in case of a problem, repair and replacement work can be easily carried out.