To provide s vibration motor, suited for the purpose of incorporating it in a portable wireless communications apparatus or a wrist watch, which can generate sufficiently effective vibration without the necessity to increase the outer diameter of a weight and consequently, increase the volume and the weight of the oscillating motor.

The vibration motor 4 is of such a structure that a bearing part 10 protrudes from the face of a motor housing 11 and the weight 3 has an almost half-moon shaped section i.e., a section having an eccentic center of gravity and further, an extension part 30 having the inner peripheral part avoiding the bearing part 10 is extended in the direction of the bearing part 10, at the rear part of the weight 3 the same half-moon outer shape as the weight 3. In addition, the motor 4 is characterized in that the overall length of the extension part 30 is sufficiently large as compared with the overall length of the weight 3.