PROBLEM TO BE SOLVED: To provide a medical soft container which facilitates injection of a liquid matter into an empty medical soft container and makes a scale easily visible during the injection of the liquid matter.SOLUTION: A medical soft container 1 includes: a flexible bag member 2 formed by sticking at least two soft plastic sheets 2a, 2b, including an opening/closing opening 4 and a storage part 21 storing a liquid matter, and displayed with a scale 2c showing an amount of the liquid matter on at lease one main surface; a discharge port 3 fixed on the flexible bag member 2; and a pair of opening/closing operation parts 5a, 5b fixed on both main surfaces of the flexible bag member respectively and forming penetration paths 7a, 7b for inserting a finger from a right or left side of the flexible bag member 2 between the opening/closing operation member and the fixed soft plastic sheet.SELECTED DRAWING: Figure 1