A sawtooth wire for producing an all-steel sawtooth arrangement for processing textile fibers has a wire body having a plurality of teeth arranged successively in the longitudinal direction of the wire body. Each tooth has a tooth bottom and a tooth tip, wherein a tooth breast extends from the tooth bottom toward the tooth tip and a tooth back starts at the tooth tip and extends toward a successive tooth bottom of the successive tooth. The tooth back of at least one of the teeth has one or more convex portions passing over into a concave portion, respectively, in a direction toward the tooth bottom.