| 摘要 |
An easy opening envelope is provided to form a semi-circular recess having a size of a user's finger on one side of the envelope to enable a user to open the envelope easily without additional costs. An easy opening envelope includes a front portion(10), an upper end bonding portion(20), a lower end bonding portion(40) and a rear bonding portion(30). A perforated recess(50) is formed on any one of the upper end bonding portion, the lower end bonding portion and the rear bonding portion(30). The perforated recess is formed on a position that comes into contact with the front portion, and has a semi-circular shape whose diameter is 10mm - 20mm. The envelope is opened easily by letting a user put his finger into the semi-circular perforated recess.
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