PURPOSE: To realize a reusable envelope which is easy to use and inexpensive by printing a use-and-cut line and a direction part.

CONSTITUTION: This envelope is provided with a front face having a part for an address and stamp, and a back face having a flap for sealing just as an ordinary envelope. On the front face, second use cut line 1 and third use cut line 2 are printed at a cut part from second use onward, and at the right bottom part, a direction part 3 is provided to indicate the number of times the envelope is used. Also on the back face, first flap 4 for sealing in using the same for the first time, second flap 5 for sealing in using for the second time, and third flap 6 for sealing in third use are provided. By this, the envelope can be used two times or more without being thrown away after one time use as a traditional envelope for one time use, and a natural material used roughly equal to the envelope is used for several times. In this way, a reusable envelope which is easy to use and to produce, and inexpensive can be offered.