Abstract: A boat docking device comprising a base plate, a cleat attached to the base plate, two openings disposed at opposite ends of the base plate through which two bolts extend, and two nuts. Each bolt includes an engaging end portion around which a nut engages, and a stop end portion through which a bar is perpendicularly situated for engaging the underside of a plank dock. The bolts along with their respective bars are capable of being placed through a gap between two dock planks. The bolts may thereafter be axially rotated so that the bars are perpendicular to the gap. Subsequently, the nuts may be tightened so as to pull the bars securely against the underside of the dock planks.