To provide a switch mounting tool capable of fixing a cylinder switch simultaneously with fixing a mounting band of the cylinder switch to a cylinder tube by means of a fastening screw attached to the cylinder switch.

The fastening screw 6 is fastened, and a screw end face pushes the cylinder tube through a bracket 4. Simultaneously, the fastening screw 6 pushes up a switch body 5a through a fastening nut 5d, and the switch 5 is held by the bracket 4 fastened by the mounting band and pulls up the mounting band. Thus, the fastening screw 6 is fastened, and the mounting band is fixed.