A highly versatile stator manufacturing device is provided. A stator manufacturing device 7 includes: an engagement portion 8 engageable with a distal end of an extension portion 5 of each of a plurality of conductor segments 4 extending from a plurality of extension positions that differ in a radial direction R in each slot 3 of a stator core 2; a circumferential direction drive portion 9 that drives the engagement portion 8 engaging with the extension portion 5 in a circumferential direction C, to bend the extension portion 5; and a radial direction drive portion 10 that drives the engagement portion 8 in the radial direction R.