PACKAGING BOX HAVING SEPARABLE UNSEALING CUT LINE

PROBLEM TO BE SOLVED: To facilitate unsealing by inscribing perforation-like cut lines continuously over four faces of four peripheral side plates constituting a body of a packaging box and forming the cut line to be inscribed on at least one side plate like a bypass line for forming a protrusion on one of the side plates sectioned by the cut line. SOLUTION: A perforation-like cut line 11 is continuously formed along front, rear, left and right side plates 1 to 4 constituting a body 5 of the paper packaging box C to separate the body 5 into upper and lower parts. At this time, a cut line 11a placed on the front side plate 1 among the cut line 11 is inscribed to be inclined downward to the right and a cut line 11b placed on the rear side plate 2 is inscribed to be inclined downward to the left, while both ends of a cut line 11c placed on the left side plate 3 are made to be contiguous with inclined upper ends of the inclined cut lines 11a, 11b and an intermediate part is formed into an arc protrusion 12 protruding downward. Thus when the cut line 11c is cut to open, the arc protrusion 12 is folded inside the paper packaging box C to provide a hook for a finger.