Abstract: There is provided a housing bag which does not require a closing means, and facilitates the handling by the user while preventing the widening of the opening portion, and enabling the prevention of the dropping out of the housed article. The housing bag A is such that the internal configuration thereof is made approximately the same as the external configuration of the article to be housed while the bag has a bag-like configuration having an opening on one side. On the internal circumference of the opening portion 2, a cushion material 3 and an auxiliary material having a higher elasticity, stability and a endurance than the material constituting the main body 1 of the bag are overlapped to be arranged thereon. The opening portion 2 is formed with a thickness having an extension and the aforementioned auxiliary material 4 is constituted of a tape-like thermo-plastic urethane resin.