Recording-material-transporting apparatus and image forming system with oppositely oriented image readers

A recording-material-transporting apparatus comprising:

• a transport unit configured to transport a recording material and cause the recording material to pass through a first location and a second location that is downstream of the of the first location in a recording-material-transporting direction;
• a first reader including a first light receiver configured to receive light reflected by the recording material, the first reader being configured to read an image on a portion of the recording material at the first location and on one surface of the recording material;
• and
• a second reader including a second light receiver configured to receive light reflected by the recording material, the second reader being configured to read an image on a portion of the recording material at the second location and on another surface of the recording material,
• wherein the first light receiver is downstream of the first location in the recording-material-transporting direction, and/or the second light receiver is upstream of the second location in the recording-material-transporting direction, further comprising:
• a plurality of guide members at different positions in the recording-material-transporting direction and configured to guide the recording material that is transported, the plurality of guide members being retractable, by rotating, from a transport path along which the recording material is transported,
• wherein the plurality of guide members are in one of two regions that face each other with the transport path disposed therebetween, and no guide member retractable from the transport path is in another of the two regions.