The method of the present invention can 1) produce spherical and scaly ultrafine particles without pulverization, 2) obtain spherical ultrafine particles having a sharp spherical particle diameter distribution without requiring a sieving step, 3) produce spherical ultrafine particles extremely approximating a true circle and possessing a particle diameter of 100 nm˜50,000 nm allowing selection of a size suitable for the particular purpose of use and 4) produce spherical ultrafine particles on a commercial scale at low cost. There is also provided spherical ultrafine particles produced by the above production process. The spherical ultrafine particles of the present invention are characterized by a form having circularity of 0.9 to 1.0 and a particle diameter of 0.01 μm to 10 μm without pulverization. The spherical ultrafine particles can be produced by the method of the present invention using as a nozzle a base having special through holes and hole density. In this base nozzle, the through holes have a diameter of 0.05 μm˜50 μm, a through hole aspect ratio of 5 to 200 and a hole density of 100 to 7,000/cm2.