To provide a both-end holding cutting tool for the finish machining of an end face generated by cutting a structural member such as a carbon fiber reinforced plastic plate (main wing, empennage, fuselage and the like), duralumin plate, other synthetic resin plate, metal thin sheet, and the like into an arbitrary shape, and a holding device for the both-end holding cutting tool.

The both-end holding cutting tool 100 includes a blade 10 in the center and holding parts 2, 3 at both ends. The blade is constituted of an end mill or a grindstone. Also, the holding device for the both-end holding cutting tool includes a rotary main spindle and the like connected to a rotary drive shaft of a working machine.