A deposit machine having a cassette with improved usability. The deposit machine includes a body and a header housing integrally fixed to one side of the body and having an infrared ray (IR) sensor and a magnetoresistance (MR) sensor mounted thereon. The IR and MR sensors detect whether banknotes are counterfeit banknotes and whether the banknotes are accommodated. A header cover openably and closably fixed to the header housing by a hinge to allow top of the header housing to be open. The cassette mounted inside the body accommodates banknotes supplied from the header housing.