A bill box for use in a bill acceptor having a RFID read/write module and adapted for receiving bills from the bill acceptor is disclosed to include a housing having a bracket provided with locating grooves, bottom plates, stop plates, finger slot and stop grooves and suspending therein and dividing the internal space of the housing into a bill storage chamber and a partition chamber, and a memory carrier provided with stop blocks, retaining lugs, springy retainer and stop strips for quick mounting in the bracket in a detachable manner and carrying a wireless memory device for recording bill storage data by the wireless read/write module of the bill acceptor wirelessly for quick data check.