| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive cardboard case which does not bend at an unwanted unprescribed place in making or piling up the same and which is easily separable and openable. SOLUTION: A cardboard case 2 is structured by connecting a top wall 4, a side wall 6, a bottom wall 8 and a side wall 6 one after another. The side wall 6 is provided jointly with an inside flap 10. The top wall 4 and the bottom wall 8 are jointly provided with an outside flap 12. In the vicinity of the inside flap 10 of the side wall 6 and in the neighborhood of the side wall 6 of the inside flap 10, a corner support part is formed extending along the border line of the both. The part of the side wall 6 other than the corner support part extends horizontally, and one end of which is formed with an open belt 16 for separation reaching the corner support part. The part of the inside flap 10 other than the corner support part extends horizontally and one end of which is formed with a slit 18 reaching the corner support part.
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