Abstract: A packaging box includes a body and a lid. The body includes a bottom surface part, a front surface part rising from the bottom surface part, and protruding pieces positioned at one side portion of the front surface part and extending from an upper edge of the front surface part. The lid includes a top surface part, a lid front surface part, lid side surface parts opposed to each other, and two lid front side joints joined to inner surfaces of both sides of the lid front surface parts. The lid front side joints have cutout portions at the upper end portion, bendable portions below the cutout portion, and a non-joint portion formed between the bendable portions and the lid front surface part, into which the distal ends of the protruding pieces can enter. The lid closed state is maintained by engagement between the protruding pieces and the bendable portions.

Abstract: A prefilled syringe is configured so that, in order that a liquid medicine injected and administered into the upper layer part of skin is prevented from leaking out of the living body, a pressing section can be held in a position reached when it has been completely pressed in. A prefilled syringe 1 is provided with: a double-ended needle 3 having a needlepoint 9 which can be inserted into a living body; a needle hub 4 for holding the double-ended needle 3; an outer tube 2; a pressing section 22; a liquid medicine storage section 6 for storing a liquid medicine M; a holding section 8; and a sealing body 23. The liquid medicine storage section 6 is disposed within a tube hole 2a of the outer tube 2. The pressing section 22 operates the liquid medicine storage section 6 so that the liquid medicine storage section 6 can move in the axial direction of the tube hole 2a of the outer tube 2.