A lighting device (100) for lighting by emitting lighting light by light emission of an LED element (6), wherein the area of a spectrum of the lighting light having a wavelength of 600 nm to 700 nm is 30% to 70%, and the area having a wavelength of 400 nm to 500 nm is 20% or less with respect to the area having a wavelength of 400 nm to 800 nm, the spectrum of the lighting light has a maximum value between 600 nm and 700 nm, and the value of the spectrum at 550 nm is 50% or less of the maximum value.