A combination container/syringe comprising: an outer cylinder that forms a cylindrical shape extending along an axial line; a front stopper that is inserted into a distal end side of the outer cylinder; an end stopper that is inserted into a rear end side of the outer cylinder, and that seals a medicinal solution in a space with the front stopper; a cylindrical tip that is provided with a bypass chamber that houses the front stopper at the distal end side of the fitting hole; a finger grip that is fitted on the rear end side of the outer cylinder; and a plunger rod that is inserted in the outer cylinder from the rear end side of the outer cylinder to be coupled to the end stopper, wherein an inner diameter of the bypass chamber is formed larger than an outer diameter of the front stopper, wherein on an inner peripheral surface having a circular cross section of the bypass chamber, a plurality of ribs that protrude toward an inside in a radial direction and extend over the entire region in the axial line direction of the bypass chamber to be capable of making close contact with an outer peripheral surface of the front stopper that has moved to the inside of the bypass chamber are provided spaced apart in a circumferential direction; characterized in that the cylindrical tip is fitted to an outer periphery of the distal end of the outer cylinder via a fitting hole at a base end side, and provided with a luer tip for attaching an injection needle; and in that when the front stopper is supported in the bypass chamber by the ribs making close contact with the front stopper, a medicinal solution flow-through space that extends in the circumferential direction between the ribs that are adjacent and whose dimension in the radial direction is uniform over the circumferential direction is formed between the outer peripheral surface of the front stopper and the inner peripheral surface of the bypass chamber; and wherein air bubbles in the medicinal solution can be effectively expelled to the outside via the medicinal solution flow-through space. an outer cylinder that forms a cylindrical shape extending along an axial line; a front stopper that is inserted into a distal end side of the outer cylinder; an end stopper that is inserted into a rear end side of the outer cylinder, and that seals a medicinal solution in a space with the front stopper; a cylindrical tip that is provided with a bypass chamber that houses the front stopper at the distal end side of the fitting hole; a finger grip that is fitted on the rear end side of the outer cylinder; and a plunger rod that is inserted in the outer cylinder from the rear end side of the outer cylinder to be coupled to the end stopper, wherein an inner diameter of the bypass chamber is formed larger than an outer diameter of the front stopper, wherein on an inner peripheral surface having a circular cross section of the bypass chamber, a plurality of ribs that protrude toward an inside in a radial direction and extend over the entire region in the axial line direction of the bypass chamber to be capable of making close contact with an outer peripheral surface of the front stopper that has moved to the inside of the bypass chamber are provided spaced apart in a circumferential direction; characterized in that the cylindrical tip is fitted to an outer periphery of the distal end of the outer cylinder via a fitting hole at a base end side, and provided with a luer tip for attaching an injection needle; and in that when the front stopper is supported in the bypass chamber by the ribs making close contact with the front stopper, a medicinal solution flow-through space that extends in the circumferential direction between the ribs that are adjacent and whose dimension in the radial direction is uniform over the circumferential direction is formed between the outer peripheral surface of the front stopper and the inner peripheral surface of the bypass chamber; and wherein air bubbles in the medicinal solution can be effectively expelled to the outside via the medicinal solution flow-through space.