| 摘要 |
PROBLEM TO BE SOLVED: To provide an envelope capable of being opened easily with finger tips without using such tools as a pair of scissors or a knife in opening the envelope or the like. SOLUTION: In the standard or non-standard size envelope or the like, a zipper-like break line provided on a fold line of a lid piece part of the envelope body, a zipper-like break line provided along the tip part which is folded and bonded to the envelope body when the lid piece part is sealed, and a cut line provided along a corner part on one side of the lid piece part are provided, and the cut line is arranged at the corner part on the start side of the break line.
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