An object of the present invention is to provide an orally disintegrating tablet (ultrafast-disintegrating tablet) having an extremely high disintegrability (short disintegration time), and a high tablet hardness, and to provide a simple method for the production of said ultrafast-disintegrating tablet without such a complicated process as freeze-drying.This invention relates to an orally disintegrating tablet having a specific surface area of from 1.50 to 2.50 mm2/mg and a weight of from 10 to 50 mg, particularly having a disintegration time in water of 7 seconds or less and an oral disintegration time of 5 seconds or less, a method for the production of said orally disintegrating tablet, and to a disintegrative particulate composition for use in said method.