A media transaction device comprising: a device housing having a front panel; a media processor provided at an interior of the device housing; a media accommodating unit provided at an interior of the media processor; and a foreign matter sensor detecting absence/presence of a foreign object at the media accommodating unit. The front panel includes a first port for inserting and dispensing the media, and a first shutter opening and closing the first port. The media processor includes a second port disposed to face the first port, and a second shutter for opening and closing the second port. The media are inserted into and dispensed from the second port such that the media are inserted into and dispensed from the first port, and opening and closing of the first shutter and the second shutter are controlled based on detection results by the foreign matter sensor.