The invention discloses an LED lamp. The LED lamp comprises a base body and a plurality of LED lamp beads, the base body is of a cylinder structure and divided into an inner layer and an outer layer, and a cavity is formed between the inner layer and the outer layer; and a heat dissipating device is annularly arranged on the side surface of the inner layer, the heat dissipating device comprises heat dissipating pieces, the heat dissipating pieces are in slice shapes and fixed in heat dissipating grooves, every two adjacent heat dissipating pieces are connected through springs, and buckles are arranged on each heat dissipating piece. The LED lamp has the beneficial effects that the LED lamp beads are annularly arranged in fixing grooves of the side surface of the base body so that an irradiation range can be enlarged, and a single irradiation direction is avoided; through heat dissipating channels formed in the outer layer and the heat dissipating pieces arranged on the inner layer, inner and outer double-heat-dissipation is formed, the heat dissipating channels communicate with the fixing grooves, and the heat dissipating effect can be enhanced while a traditional installation mode is not changed; and the structure is simple, the use effect is good, and the practicability is high.