Abstract: A fishing line float is disclosed. The float may be mounted securely to a fixed point along the line or in a manner whereby the float may travel along the line. The float includes a buoyant body having a recess therein. A line guide head is mounted on the end of a stem extending through the recess. A plunger is movably mounted on the stem between the head and body. The plunger includes a recessed area for acceptance of the head, the plunger spring-biased against the head. The plunger and head include a slot and a grove respectively which, when aligned, form an enclosed straight-line passage through them for mounting the float in movable fashion on a fishing line. The head Includes a notch through which the line may extend before wrapping around the head between the head and plunger. A tab on the plunger extends partially into the notch to prevent the line from pulling from its locked position.