A fishing spool line control system includes a cutter housing attached to an annular elastic cloth band that fits around and covers fishing line on a spool. Fishing line, such as tippet, is fed from the spool through a hole in the rear of the cutter housing, and is cut to desired length by a blade in the front of the cutter housing. A thumb rest behind the blade allows pressure to be placed on the cutter housing, allowing safer, easier, and more accurate cutting of the fishing line.