Abstract: Disclosed is a vibrator including: a rotary member having a center plate and a unipolar magnet of an arc shape eccentrically disposed on the outer surface of the center plate, the center plate having a through hole formed in the center; a shaft inserted into the through hole of the center plate; a pair of bobbins divided into upper and lower bobbins, each bobbin having a confined space and a support hole, wherein the rotary member is rotated within the confined space and the shaft is inserted into the support holes to thereby rotate the rotary member; and a coil wound on the bobbins connected with each other, the coil generating a magnetic force with the polarity opposite to that of the magnet. The vibrator, which is embedded in communication equipments, such as mobile phones and radio pagers, generates a strong power of vibration using a low electric power.