PURPOSE: A motor is provided to obtain the stability during rotation of a rotor by improving the combining strength of a rotation shaft and a rotating body. CONSTITUTION: A rotation shaft(30) is supported by a stator(40) to be rotating. A rotating body(10) rotates with the rotation shaft as one body. A herb(20) comprises a body or ring shape being interposed between the rotation shaft and the rotation body and a protrusion(22). The protrusion extends the outer circumference of the body combining with the rotator.
