Fishing line is a component of angling equipment, serving as the connecting link between the fishing reel and the bait or lure. It is a strong, flexible, and usually transparent or low-visibility material that is designed to withstand the dynamic forces associated with angling. Fishing lines are typically made from various materials, each offering distinct characteristics to suit different fishing conditions and target species.

Common materials used for manufacturing fishing lines include monofilament, fluorocarbon, and braided lines. Monofilament lines are made from a single strand of nylon or similar materials, offering flexibility, stretch, and buoyancy. Fluorocarbon lines are known for their low visibility underwater, abrasion resistance, and minimal stretch. Braided lines consist of multiple strands of fibers tightly woven together, providing high strength, sensitivity, and low stretch.

The choice of fishing line depends on factors such as the type of fishing, the species being targeted, and the fishing environment. Different lines have varying tensile strengths, diameters, and stretch properties, influencing casting distance, sensitivity to bites, and the ability to withstand the challenges posed by underwater structures or sharp-toothed fish.