An ultraviolet drying device (37) and a photoelectric sensor (70) for detecting a circumference of a carrying trunk (36) are provided at a position close to the circumference of the carrying trunk (36) set on a downstream side of a carrying direction of a sheet-like article of a rear surface printing unit (11) for posterior printing. When the ultraviolet drying device (37) is turned on and the photoelectric sensor (70) detects that no fouling prevention member is attached to the circumference of the carrying trunk (36), the driving of a printing machine stops. Further, when an IR lamp (46) ofan infrared drying device (47) is turned on and the photoelectric sensor (70) detects that no fouling prevention member is attached to the circumference of the carrying trunk (36), the driving of theprinting machine stops. This prevents the fouling prevention member attached to protect the trunk from being deformed in a liquid crystal transcription device.