Provided is a sheet inverting apparatus wherein members, such as a roller, is not brought into contact with a printing surface of a sheet at all when the sheet is inverted or having its direction changed, and dirt is eliminated by eliminating friction of an ink on the surface of the sheet. A first transfer apparatus (81) and a second transfer apparatus (82) have a plurality of transfer belts (84) moving on transfer tracks along a sheet transfer direction, and a suction box (86) which sucks the sheet on the transfer belts through suction holes (84a) formed on the transfer belts (84). A turn guide (83) arranged between the first transfer apparatus (81) and the second transfer apparatus (82) has a plurality of guide ribs (87) between the transfer belts (84). Each of the guide ribs (87) brought into contact with the sheet by sliding thereon forms a curved inverting transfer surface (87a) from an inversion starting point side to an inversion end point side.
