To provide a method for balloon handiworks by which even a beginner can easily produce balloon handiworks without a special skill and even new/ types of balloon handiworks.

Air is supplied inside by operating a pump 21 so as to form a main body 13 without bringing air into a whole long and narrow balloon 1 in such a way as to leave its tip 14. When the long and narrow balloon 1 becomes of a predetermined length, the opening side 11 of the long and narrow balloon 1 is tied up to form a knot 12. Pressure is applied to the main body 13 of the long and narrow balloon 1 to make the main body 13 long and narrow. To be concrete, the main body 13 is lengthened by pulling the whole air in the main body 13 in such a way as to move to the side of the tip 14. In other words, the main body 13 is pulled as pressing to make the main body 13 long and narrow. Therefore, a touch when gripping the main body 13 becomes softer in comparison with the state of the main body 13 immediately after it is pumped up with air, and fine work becomes easy. The balloon on which pretreatment is performed in this way is used to form an object such as a flower and an animal.