PROBLEM TO BE SOLVED: To provide a packaging paper case which can be simply fabricated into the shape of a case out of the state of being unfolded and stably held under the state of being fabricated and also can be dismantled quickly without being damaged. SOLUTION: At the lower ends on both sides of right and left of inner panels 1a and 2a of front-side and backside panels 1 and 2 each comprising the inner and outer panels 1a, 1b and 2a, 2b, notched parts 11 and 11 each in a width smaller than the width of each of bottom panel overlapping pieces 6 and 6 of right and left panels corresponding to the front-side and backside panels are provided. Finger insertion holes 8 are provided respectively at the lower ends of the inner panels 1a and 2a on positions each at the middle in the breadthwise direction. Both of the end edges of the bottom panel overlapping pieces 6 and 6 of the right and left panels are formed respectively in a shape tilting toward the inside. A pair of inner panel bending creases 9 and 9 each extending toward corners on the right and left at the upper end of the inner panel are provided at the peripheral edge of each of the finger insertion holes 8. Gap forming protuberances 14 and 14 projecting toward the outer panels 1b and 2b are provided respectively at bottom panel overlapping pieces 5 and 5 of the front- side and backside panels.
