Packing box

A packing box comprising inside lids, at least part of an opening of the packing box through which to insert and take out an object to be packed being capable of being closed by the inside lids, the inside lids opposed to each other in a plane, wherein:

• the inside lids have a cut portion including a cut that is shaped so as to be suitable for the external shape of a portion of the object and folded portions formed by folding the respective inside lids, and, when the inside lids are closed, the cut is fitted with the portion of the object housed in the packing box to fix the object in a state that walls, opposed to each other, of the respective folded portions are in contact with each other,
• the cut portion is formed in one of the folded portions so as to be suitable for the position of the portion of the object, and the cut is formed in a wall excluding the wall that comes into contact with the wall of the other folded portion when the inside lids are closed.