the pressed finger it receives the reflection light from the finger through the window and reads the fingerprint information of the pressed finger based on the received light hereupon herein the finger is a conception including the thumb the fingerprint information reading section 4 conducts the personal certification when the fingerprint as the living body information of the user is read hereupon in replace with the fingerprint information reading section 4 or in addition to it an information reading section by which the another living body information for example the voice information or iris information is read can also be adopted the ic card drive 6 has an insertion opening for inserting an ic card and reads the information written in the inserted ic card or writes the information in it the memory section 3 stores the printing job data or the certifying information of a controller or the user the certifying module 7 certifies when a password inputted from the operation display section 8 and or the certifying information such as the fingerprint information from the fingerprint information reading section 4 is compared to the certifying information stored in the memory section 3 the transfer sheet conveying section 40 includes the jam removal door lock member 403 jam removal door open close sensor 405 and jam sensor 406 the jam removal door lock member 403 has for example an electromagnetic solenoid and when it is a lock member in which the electromagnetic solenoid is controlled by an electric signal and a lock operation or a lock release operation is switched it may be allowed further when the lock operation.