To provide a photosensitive recording medium housing cassette capable of supplying a photosensitive recording medium into an image forming device, without erroneously exposing the photosensitive recording medium, with reduction in size and cost.

This cassette 2 is provided with a shutter 11 which is closed to shield the photosensitive recording medium 10 from light at all times and opened so as to supply the photosensitive recording medium 10 into the image forming device 1, when the cassette 2 is fitted to the fixed position of the image forming device 1. Thus, the recording medium 10 can be supplied into the image forming device 1, without being erroneously exposed and a compact inexpensive cassette 2 can be provided.