Abstract: A truck bed lock that includes an outer shell, an inner casing disposed therein, and an internal shaft within the inner casing. A locking rod slidingly engages the internal shaft and a bottom compartment in the inner casing beneath the internal shaft. A quartet of spring-loaded legs, pivotably attached to a base of the locking rod, are maintained in a retracted position within the bottom compartment when the locking rod is extended for insertion through a hole in each of a tool box and a truck bed. Thereafter, the locking rod is retracted into the internal shaft and thereupon, the legs extend through a lower opening in the bottom compartment into a locked position parallel to a lower end of the outer shell with the legs being co-planar with one another adjoining the base of the locking rod to secure the tool box against the truck bed.