The medium conveying mechanism includes a motor, a driving pulley adapted to be rotated by the motor, an endless belt wound around the driving pulley and adapted to be moved by the driving pulley in a belt moving direction, a first driven pulley around which the endless belt is wound and adapted to be rotated by the endless belt, a first conveying roller disposed on the medium conveying path and adapted to be rotated by the first driven pulley to convey the medium, and a first pressure roller disposed to correspond to the first conveying roller so as to press the medium against the first conveying roller. A distance in the medium conveying path between the information reading position and a nip portion between the first conveying roller and the first pressure roller is shorter than a distance between a leading end of the conveyed medium and back end of the recording area. The first driven pulley is disposed upstream from the driving pulley in the belt moving direction.