To provide a recording medium carrying device eliminating an error in carrying a recording medium in an imaging device and maintaining a constant printing writing position.

An auxiliary carrying roller 11 stops rotating once at the time E when it deflects with the end hitting a resist roller 12 for timing printing writing and the auxiliary carrying roller 11 having a carrying speed set to be faster starts rotating in synchronization with the resist roller 12 at starting recarrying. Thus, the recording medium is surely bitten into the resist roller 12 and stably carried.