A linear motor includes a stator and a mover coupled to the stator. The stator includes a stator body and at least one guiding portion protruding from the stator body. The mover includes a mover body and at least one sliding portion protruding from the mover body. The at least one sliding portion defines a receiving groove. The at least one guiding portion is received in the receiving groove. A gap is defined between the at least one guiding portion and the at least one sliding portion. The mover defines at least one air inlet hole communicating with the gap and configured to inject air into the gap.