PURPOSE: To obtain a currency transaction apparatus which operates efficiently, is compact and is economically superior by unifying the common function portions of receiving mechanism and paying mechanism and containing the same within the same housing.

CONSTITUTION: To a main control part 86 are supplied the genuineness discrimination signal and overlap taking signal from a received money discriminating part 81 as well as the overlap taking discrimination signal from a paid money discriminating part 83. A keyboard 17, guide display part 18 and money amount display part 19 are connected respectively via input-output control part 78 to the main control part 86. Further a card reader 21 and a printer 22 are connected via respective control parts to the main control part 86. And a receiving control part 90 and paying control part 91 are controlled by the main control part 86 to let the receiving part 24 and paying part 25 to actuate respectively. Such constitution of the control part enables many common points such as disiplay part, note conveying paths and their driving part, communication control unit, etc. to be provided.