A six-strap insertion fastener file case comprising a case body (P) and a case cover (P1) and provided with inner and outer insertion fasteners. The inner insertion fasteners (X1 and X2) are constituted by three lateral straps (E, A, and B) and two inner pins (E3 and E4). The outer insertion fasteners (X3 and X4) are constituted by three longitudinal straps (F, C, and D) and two outer pins (F3 and F4). Both extremities of the four straps (A, B, C, and D) forming an insertion set are planted and led outward and then planted and run in from another two holes and fixed by being tied to the straps themselves or connected head-to-tail. Both extremities of the two straps (E and F) fixing the pins are planted and led outward and strapped onto the pins. The file case is has the advantages of being firm in binding, environmentally friendly, durable, and free from formaldehyde hazards to a file manager and corrosion of files.
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