The present invention discloses a ribbon rack of a printer. The ribbon rack of a printer comprises a ribbon cartridge, a ribbon and a guiding frame. One part of the ribbon is located in the ribbon cartridge, another part of the ribbon is located out of the ribbon cartridge, the guiding frame is installed at the ribbon located out of the ribbon cartridge, the guiding frame comprises a U-shaped frame, guiding parts are symmetrically arranged at two ends of the U-shaped frame, each guiding part is formed by a cylinder, a front baffle plate and an edge baffle plate which are arranged in order from the two ends of the U-shaped frame to the center of the U-shaped frame and are fixedly connected on a support rack, the edge baffle plates of the two guiding parts are adjacent, and the front baffle plate and the middle portion of the cylinder are both provided with openings. The replacement of the ribbon is convenient to realize repeat usage of the ribbon rack so as to reduce the cost.