Light emitting diode lighting circuit, led light source, and lamp

Provided is a light emitting diode lighting circuit, which can light a light emitting diode with stable operations, and which has a small number of components, and is suitable for size reduction. A light emitting diode lighting circuit (10) for lighting a light emitting diode is provided with an inverter (12), which outputs a predetermined voltage for lighting the light emitting diode. The inverter (12) has: a first switching element (Q1), which has a first terminal, a second terminal, and a third terminal that controls a current to be carried or not to be carried between the first terminal and the second terminal; a capacitor (C2), which is provided on a connection path between the first terminal and the third terminal; a resistor (R1), which is provided on a connection path between the second terminal and the third terminal, and which is connected to the capacitor (C2) in series; and a trigger diode (TD), which is provided on a connection path between the third terminal and the connection point where the ca