To provide a paper carrying device, an image forming device and a paper carrying method, capable of eliminating double feeding, without impairing a sheet-like medium.

This sheet-like medium carrying device stops carrying of succeeding paper S2 by an upstream side carrying means 3 on the basis of the fact that a double feeding detecting means 15 detects that carrying preceding paper S1 becomes a single feeding state from a double feeding state, and resumes the carrying of the stopped succeeding paper S2 after eliminating the double feeding state by carrying the preceding paper S1 by leaving the succeeding paper S2.