An end cover for an external rotor motor. The external rotor motor has a stator core having a center hole, and the end cover including a body, a cylindrical connecting portion, and multiple protruding bars each having an arc-shaped top surface. The cylindrical connecting portion is extended from the center of the body and received in the center hole of the stator core, the protruding bars are disposed on outer surface of the cylindrical connecting portion and extended in an axial direction, and the arc-shaped top surface of the protruding bar is fit with inner wall of the center hole of the stator core. The end cover is accurately fit with a stator core, requires no further processing after die-casting and thus reducing production cost, and is capable of preventing aluminum scraps from entering a stator.