To provide a tightening tool for a tire anti-skid device capable of reliably tightening tightening-ends of the tire anti-skid device by a simple operation.

In the tightening tool for the tire anti-skid device, a base part of a band member (41) is attached to one tightening end (18), and base members (42, 60, 70, 120 and 200) are attached to the other tightening end. Operation levers (43, 80, 130, and 210) are mounted on the base members in an oscillating manner, a locking tooth (41C) of the band member is hooked by feed claw parts (43E, 80B, 130B and 210B) at tips by the oscillating operation of the operation levers, and feeds it to the other tightening end to narrow a space between the two tightening ends. Locking claw bodies (44, 90, 150 and 230) are supported by the base members in an oscillating manner. The locking tooth of the band member is allowed to ride over the locking claw bodies and locked to the next locking tooth when the operation levers are oscillated so as to prevent a tip of the band member from being detached.