Abstract: An eccentric rotor and a vibration motor having the rotor are disclosed. In one embodiment, the eccentric rotor comprises: a board with an insertion hole, patterned coil layers on the upper portion of the board having multiple patterned coils and stacked in several layers, and commutators formed on the lower portion of the board electrically connected to the patterned coils and formed in integer multiples of the patterned coils, wherein the board is eccentric with regards to the insertion hole. In one embodiment, the eccentric rotor and vibration motor having the rotor can significantly increase the amount of vibration even with a small volume, as well as reduce manufacture time and costs.