Illumination device

The light source portion is provided with a plurality of LED circuits having a plurality of LEDs. A plurality of drive circuits are provided which cause the LEDs to be lit per LED circuit in response to input of PWM signals. The PWM control circuit outputs PWM signals per drive circuit in response to input of lighting control signals and simultaneously make the output timings of the PWM signals different from each other per drive circuit. By making the output timings of the PWM signals different, the period of time during which the LEDs are turned off can be reduced as the entirety of the light source portion, and the occurrence of flickering is reduced without increasing the lighting frequency.