Abstract: A filtering device for an injection device which includes a syringe and a needle affixed to the syringe. The filtering device comprises an elongated hollow tubular element mounted on the medical injection device to surround and sealingly enclose the needle. The end of a tubular element remote from the tip of the needle is open for the introduction of fluids therethrough into the hollow interior of the tubular element. A nonfiber releasing filtering member for filtering fluids is provided which includes a central filtering portion corresponding in size to the size of the opening of the end of the tubular element and outer peripheral portion surrounding the central filtering portion. A securing sleeve is provided for securing the filtering member to the tubular element at the open end thereof.