An LED lighting device includes: an LED unit which includes at least one LED device; and a rectifier which rectifies a current power signal output from the ballast and transfers the rectified current power signal to the LED unit. When the ballast is a low-frequency ballast having an output frequency less than 60 Hz, the rectifier opens between a main path for supplying power to the rectifier from the ballast and an auxiliary path for preheating a starter or filament of the ballast. When the ballast is a high-frequency ballast having the output frequency greater than 20 kHz, the rectifier short-circuits between the main path for supplying the power to the rectifier from the ballast and the auxiliary path for preheating the filament of the ballast.