To provide a bag with the function of a balance compact in structure, lightweight, and portable to easily know the weight of the bag including its contents, when the bag is carried on a journey or business.

The gripping part of the handle of a bag is divided into two parts: upper and lower A and B, and a load cell J is placed therebetween for forming a balance, so that own weight including its contents can be measured. When it is not used, it is clamped, for instance, A and B are fixed by means of D. For clamping, an interlocking switch, for instance, K is attached, and when it is used, an electric circuit is operated between the balance and the switch. As the electric supply, a solar battery H or a small-size battery is used, and the bag is provided with an electronic digital weight display plate 1 on its outside, and attached electronic parts G on its inside.