A rotation assembly for a motor comprises a hub, a shaft, a buckling member and a fixing plate. The hub has a through-hole and an assembling portion. The through-hole has a first opening and a second opening opposing to the first opening. The assembling portion is located surrounding the first opening. The shaft is inserted into the through-hole of the hub and has a first end and a second end, wherein a fixing slot and a restrain portion are located between the first end and the second end. The buckling member is coupled to the fixing slot of the shaft so as to prevent the shaft from disengaging from the hub. The fixing plate is coupled to the assembling portion of the hub and has an abutting portion abutting with the restrain portion of the shaft for preventing the shaft from rotating about the hub.