A supporting part 11 arranged nearer to a head 1 than a pair of carrier rollers 3 and on the same side as a rib 2a based upon paper S for supporting the side Sb of the paper S toward the head 1 is provided. The supporting part 11 is formed so that it is wider than the rib 2a. The driving roller 3a1 of the pair of carrier rollers and the supporting part 11 are overlapped when they are viewed from a direction in which paper is carried. A ringed member 4 may be also provided in place of overlapping the supporting part 11 and the driving roller 3a1.