Abstract: A leech line cleat comprises a plate member having a lengthwise through-running slot therein in which the edge of a sail is entered and fastened. The plate member has a further path therein through which a leech line is passed, and a locking device, such as a generally V-shaped groove, in communication with the leech line path for locking the leech line relative to the cleat and sail. Preferably, the leech line path is a hollow space in communication with the slot and the generally V-shaped groove is formed in a wall defining the hollow space for the leech line.