A carbon fiber rim contains: a body, two clamping pieces, and a plurality of covering layers. The body includes a recessed fixing face defined on an outer diameter thereof so as to fix a tire and two connecting faces formed on two sides thereof so as to align with the two clamping pieces, and each clamping piece is a circular loop and corresponds to a profile of an outer peripheral side of the body. The plurality of covering layers are fitted and surround around the body and the two clamping pieces. Thereby, the two clamping pieces are fixed on the two connecting faces of the body by using the plurality of covering layers so that the two brake blocks do not contact with the body directly and brake a bicycle wheel via the two clamping pieces.