The invention provides an ion generating device, which is provided with a first air supply part in a main body housing provided with a first air intake opening, a second air intake opening and an air discharge opening, the first air supply part is formed by a vortex-shaped first housing, a first blade, and an electromotor. The first air supply part supplies air via intake from the first air intake opening to the internal of the main body housing to the air discharge opening, and is provided with a negative pressure generating hole on a first tongue piece opposite surface opposite to the tongue piece in the first housing. The external side of the first housing of the negative pressure generating hole is provided with an ion generating part, and an air supply way leading from the second air intake opening to the ion generating part, the negative pressure generating hole, the internal of the first housing, and the air discharge opening is formed.
