To provide a cable peeling device which prevents a cutting blade from slipping from a cable member that is cut and easily cuts a cable.

A cable peeling device 1 includes: a cylindrical housing 3 fixing a cable 9; and a holder 7 holding a cutting blade 5 and spirally moving relative to the housing 3. The housing 3 includes: a cable clamp 11 fixing the inserted cable 9; and a nut 15 having a female screw part 13 formed on an inner surface. The holder 7 includes: a male screw part 21 threadedly engaging with the female screw part 13 of the housing 3; a small diameter part 23 connecting with the male screw part 21 and having a diameter smaller than an inner diameter of the female screw part 13; a cutting part 25 connecting with the small diameter part 23 and protruding from the inner diameter of the female screw part 13 in the radial direction; a cutting blade 5 having an angle relative to the axial core of the cable 9; an eject window 27 ejecting cutting dust; and an attachment 29 connecting with the cutting part 25 and held by a chuck of a rotary tool.