The invention relates to an LED lamp, which comprises an LED module, a base and at least a heat radiating device, wherein the LED module is fixed on the base, at least a heat conducting component is extended out from the base side, and the heat radiating device and the heat conducting component are connected and fixed, thereby the heat radiating device and the heat conducting component are arranged around the LED module. The heat generated by the LED module is conducted onto the heat radiating device positioned on identical horizontal surface with the heat conducting component by the LED lampthrough the heat conducting component, thus the horizontal space around the LED module is fully used, to reduce the product thickness. Therefore, the LED lamp can be conveniently installed on the buildings, such as the roof or the wall with limited installing space and used for illuminating.