A packing box for photosensitive recording material comprising a box body 5 and a lid member 9, wherein the box body 5 includes a storage section 11 and a lid-covered portion 13; the lid-covered portion 13 includes a lid-covered fixed surface 15 and a lid-covered rotatable portion 19 rotatable outward and downward along a valley bending line 17, a first lid-covered end surface 21 having an upper corner portion formed into an arcuate shape and a second lid-covered end surface 23; and the lid-covered rotatable portion 19 is formed with an inner flap 43 on the side of the second lid-covered end surface 23.