A rotor of a motor according to the present invention includes a shaft; a rotor core which has a shaft insertion hole for inserting and combining the shaft; a magnet which is combined with the outer surface of the rotor core; and a rotor cover which includes an upper cap and a lower cap to cover the upper parts and the lower parts of the magnet and the rotor core, respectively. The outer surface of the rotor core comprises a first corner part and a second corner part. The inner surface of the magnet comprises a first inner surface part corresponding to the first corner part and a second inner surface part corresponding to the second corner part. So, manufacturing costs can be reduced.
