To provide a pulverization nozzle which exhibits high energy efficiency with few energy loss of gazeous flow while having a gazeous flow with sharp velocity distribution, to provide an auxiliary pulverization nozzle which makes a gaseous flow injected from a gas passageway a circular flow, and to provide a jet mill which can increase energy to collide materials to be pulverized, which can improve the efficiency of pulverization by increasing the collision occasion of the materials, and which can form a circular flow suitable for each material, is excellent in flexibility and operability and is excellent also in the miniaturization and energy saving of an apparatus.

The pulverization nozzle 3 has the high pressure gas passage 3b and a slit-shaped jet orifice 3c which is formed at an injection surface 3a and injects a gas passing through the gas passage 3b.