To provide a pivot structure of a load fastening machine, which can stop movement of a gear in an optional direction and to an optional position on a pivot.

The pivot structure of the load fastening machine includes two driving members 10, two sliding members 11, one pivot 12, and two gears 13. The ends of the driving member 10 are parallel to the gear 13 to pierce the pivot 12. One pin 14 is inserted into an exposed part of the pivot 12. The sliding member 11 is attached to the driving member 10, has elasticity of reciprocal motion, propels one of a plurality of gear blocks 17 around the gear 13 always toward the pivot 12, and locks it. One reinforcing member 20 pierced by the pin 14 is attached to the exposed end of the pivot 12. A reinforcing member 20, the side edge of which maintains a fixed distance from the pin 14, fills an extra space other than a thickness of the gear 13, and reduces an activity space of the gear 13 on the pivot 12.