To provide a flexible container enabling squeezing out of the content in the neck part and re-capping without leaving the cross section of a neck part flat and further, preventing pain of the fingers when crashing.

In the flexible container for pushing out the content from a leading end opening of the neck part, two, three or four pairs of male screws provided to the outer periphery of the neck are provided in such a manner that paired male screw chipped parts facing the circumferential direction of the male screw are set in equal intervals in the circumferential direction, the male screw is formed such that short male screw parts are intermittent, and the facing male screw chipped parts are pushed to make the neck part flat. When adjacent short male screw parts across the male screw chipped parts are brought into contact with each other, the distance of the facing male chipped parts is set to be 1/3-2/3 of the inner diameter of the neck part.