PURPOSE: To dispense with a binder removing process after molding, in performing granulation, by performing classification by using a multi-stage vibrator screen while applying tumbling granulation to classified particles to obtain desired ceramic granules.

CONSTITUTION: A vibration screen 1, which has a first stage part 3 having a relatively large mesh 5, a second stage part 6 having a relatively small mesh 7 as compared with the first stage part 3 and a receiving tray 8, is used and a ceramic material 2 to be granulated and tumbling bodies 4 are put in the first stage part 3. By vibrating this vibration screen 1 at predetermined vibration frequency, the ceramic material 2' extruded from the mesh 5 of the first stage part 3 is classified by the mesh 7 of the second stage part 6 and ceramic materials 2', 2" present on the second stage part 6 and the receiving tray 8 are granulated by tumbling granulation due to vibration. As a result, a binder removing process after granulation is dispensed with and irregularity is reduced in the size and strength of formed ceramic granules.