To provide an article constituted by integrating a document and an envelope by which input and output of variable information can be carried out using a computer.

A first ridge fold line (103), a second valley fold line a(104), and a third valley fold line b(104) are formed in a base material after carrying out necessary printing and the input and output of the information to the base material (101) by the computer, the base material is divided into four faces A, B, C, and D, a cutting out portion (106) is formed in a U-shape in a top left side of the two faces C, and D comprising the first ridge fold line (103) and the second valley fold line a(104), an adhering portion (105) is formed in an inverted U-shape in a top right side of the two faces A, B comprising the third valley fold line b(104), perforations line a(102) in a top right and left direction of the adhering portion 105 and the cutting out portion (106), perforations cb(102) are formed in the right and left sides of the second valley fold line, the cutting out portion (106) is removed, and four time folding is carried out by the first ridge fold line (103), the second valley fold line a(104) and the third ridge fold line b(104), and thereby to make an envelope integrated with the sheet.