Abstract: A banking equipment intra-cassette security device (1) being assembled under the lid (T) of a cassette (C) storing money bills (A). The device (1) includes a main block (2) equipped with cavities (3) filled with pyrotechnical material (5), which can be ignited by a wick (9) which is activated by a metallic filament (11) electrically powered by the cassette (C) circuit.