Abstract: Apparatus for serial insertion in a fishing line comprising a line segment of substantial elasticity and having connecting eyes at each of its ends for attaching the respective ends of the segment to one end of a fishing line and a fishing leader. The line segment is trained through a transverse opening in a buoyant mass, such as a casting bubble and a pair of stop beads are carried by the segment between the ends of the buoyant mass and the respective connecting eyes in order to provide limited and highly responsive elasticity in the fishing line as built in assistance in setting the fishing hook upon a strike.