To provide a packaging box for a photosensitive recording material, which easily covers a lid on a box body by eliminating any easily collapsible portion in a lid covering part.

A box body 5 has a storage part 11 for storing a photosensitive recording material, and a lid covering part 13 constituted so that a lid 9 correctly covers an upper part of the storage part. The lid covering part 13 comprises: a covering fixed surface 15 extending in the longitudinal direction; a covering turning part 19 extending in the longitudinal direction, parallel to the covering fixed surface, opening a take-out portion by turning the lid covering part downwardly to the outside along a valley-folding ruled line; and a first covering end face 21 and a second covering end face 23 which are formed at a right angle to the covering fixed surface on both sides of the covering fixed surface, and connected to the covering fixed surface and the box body. The first covering end face side of the covering fixed surface has: an upper corner part 25 formed in an arc shape, and the first covering end face side of the covering turning part comprises: an upper corner part 27 formed in an arc shape; and a curved part 35 formed in an arc shape toward the second covering end face side from an outermost edge 33 of the upper corner part immediately below the upper corner part.