Abstract: This belt buckle is characterized by having its belt-catching finger, or pin, arranged to also be used as a key or the like. A rigid flat sleeve has a dependent leg pivotally mounted on the transverse pin of the buckle to which one end of the belt is attached. The sleeve overlies the buckle. The flat head of the key is adjustably fixed within the sleeve. Keys, of various shapes, sizes and thicknesses, can be used. The belt-catching finger comprises a key-like main portion removably mounted within a T-shape casing, which is itself pivotally mounted on the frame of a belt buckle for its removal to cut key notches in a portion thereof, or to be replaced whenever desired.