To provide an adhesive tape packaging bag which can produce an effect of resource saving while pursuing the easiness for affixing an adhesive tape.

The adhesive tape packaging bag 10 includes the adhesive tape 14 equipped with a supporting body 18 and an adhesive layer 12 provided on one surface of the supporting body 18, and a detaching sheet 16 applied on the adhesive layer 12 in a detachable manner. The detaching sheet 16 is folded along a specific folding line together with the adhesive tape 14 and the adhesive tape 14 is intercepted on the inner side of the folded detaching sheet 16. When the detaching sheet 16 is detached, the adhesive layer 12 of the adhesive tape 14 is exposed on the detached side to facilitate the applying work.