| 摘要 |
PROBLEM TO BE SOLVED: To provide a developer storage unit that can reduce a force to peel off a sealing member.SOLUTION: A developer storage unit C includes a bag member 12 that has an opening 12a, has flexibility, and can accommodate a developer, and a sealing member 13 that seals the opening 12a, where the bag member 12 has a folded part 12X that is provided around the opening 12a and folded toward the inside of the bag member 12 to form the opening 12a, and the folded part 12X and the sealing member 13 are joined to each other. |
