Abstract: A fishing bobber is disclosed wherein a passageway is provided in the housing of the fishing bobber to a centerline so as to permit the fishing bobber to be releasably provided on an intermediate section of the fishing line. The fishing bobber is freely received by the fishing line at the centerline of the fishing bobber. An obstruction such as a section of tubing is positioned at a preselected position of the fishing line so as to prevent movement of the fishing bobber beyond the obstruction. In another embodiment, the fishing bobber is provided with a rotatable shaft which frictionally engages the fishing line when the fishing bobber fills sufficiently with water. The extent of fishing line which passes through the fishing bobber before the fishing line is frictionally engaged by the rotatable shaft is regulated by a shutter mechanism provided in a sidewall of the fishing bobber.