A packaging body is configured to house a prefilled syringe that comprises an outer cylinder fillable with a liquid and a plunger movable with respect to the outer cylinder. The packaging body includes a container comprising a housing portion configured to house the prefilled syringe. The housing portion is configured to house the prefilled syringes with various protrusion lengths of the plungers from the outer cylinders, and comprises a first regulating portion that regulates movement of the plunger in a distal end direction in a housed state in which the prefilled syringe is housed in the housing portion.
