<p>A mist generation device capable of stably maintaining a mist delivery pressure according to a change in the diameter of an oil hole caused when a tool is changed, capable of additionally increasing a mist delivery amount according to an increase in the size of a tool, and capable of performing a minimum quantity lubrication machining (MQL) for a small diameter drill. The mist generation device comprises an injector (11) generating mist by receiving the supply of a gas from a gas supply source (20) and a liquid inside a container (1) and jetting the mist into the container (1), a conduit (7) leading the mist in the container (1) from the container (1), and an auxiliary mist generating part (40) installed on the downstream side of the injector (11).</p>
