An LED lamp has a substrate on which an LED is mounted, a dome-shaped translucent part covering the LED, a heat-radiating section connected to the substrate, a metal cap section to be connected to a power supply source, and a socket unit for connecting the heat-radiation section and the metal cap section, the socket unit having a socket opening section; the heat-radiating section having a body section connected to the substrate, a plurality of heat-radiating fins connected to the body section, and a cover section connected to the heat-radiating fins, the cover section covering the heat-radiating fins; and an air channel being configured so as to pass through from a gap between the translucent part and the cover section, between the heat-radiating fins, and to the socket opening section.