The present disclosure provides a motor including a base, a stator and a rotor. The stator is disposed on the base. The base includes a cylinder. There is a flange disposed on a side of the cylinder neighboring to the rotor. Fins are axially disposed on the flange, and the periphery of the flange has a breach. The breach is partially extended to the cylinder, and there is also a plurality of fins disposed in the breach. A plurality of air-guiding members are annularly disposed on the periphery of the rotor. The air-guiding members are connected to each other through a connecting rim. The fins on the flange and the air-guiding members of the rotor are both extended axially, thus the interference therebetween is avoided. When the motor rotates, the air-guiding members are able to drive the flow passing through the breach for achieving heat-dissipating effect.