An LED lamp includes a heat dissipating body, a rotating front cover, an LED assembly, a lens assembly, a driving unit, and a socket. The heat dissipating body has a plurality of fins for dissipating heat. The rotating front cover is rotatably disposed in the front side of the heat dissipating body, the inner wall of the rotating front ring has a screwed channel. The LED assembly is disposed in the heat dissipating body. The lens assembly has a screwed thread mating to the screwed channel and disposed in the heat dissipating body. The lens assembly can be moved via rotating the rotating front cover. As a result, the illuminating angle of the LED lamp is adjustable.