The invention relates to a semiconductor lighting technology, in particular to an LED (light-emitting diode) globular bulb which comprises a bulb body, wherein a thread interface part and a light extraction cover are arranged at two ends of the bulb body respectively; and the LED globular bulb is characterized in that the bulb body is in a double-layer cylindrical structure formed by an inner cylinder and an outer cylinder, heat exchange fins are arranged in an accommodating space between the inner cylinder and the outer cylinder, and air holes for communicating the accommodating space with the external space are arranged at the two ends of the bulb body respectively. The invention provides the LED globular bulb which is convenient to clean up dust.