Abstract: An improved fishing reel attachment is disclosed for removable attachment to a fishing rod reel having a spool rotatably mounted between parallel spaced cheek plates, which cheek plates are connected together by a number of spaced removable cross bars. The attachment includes, in addition to various operational parts, a control arm which extends transversely away from a cross bar on which it is mounted and which has a curvature corresponding to the curvature of the spool; a guide part which is supported by the control arm and which guides a fishing line wound on the spool; and a U-shaped bias support member mounted rigidly on two adjacent cross bars. A coil spring disposed between the bias support arm and the control member is adapted to act towards the rotational axis of the spool so as to urge the control member to pivot about its cross bar, bringing a brake element into frictional contact with the spool to retard rotation of the spool.