PURPOSE: To substantially improve handleability by carrying a bag by a hand or on a shoulder when housed objects are few and pulling out a handle, using casters and pulling and carrying it when the housed objects are many.

CONSTITUTION: A housing part composed of front and back surfaces, left and right gore parts, an upper surface and a bottom part is manufactured by soft cloth. A bottom contact plate composed of a synthetic resin for which a bottom plate part and a rising part abutted to the lower part of the left and right gore parts are integrally formed is abutted to the bottom part of the housing part, the casters 15 are attached to one of the left and right end parts of the bottom contact plate and the handle 19 of a long length is freely retractably attached to the other end part further.