Patent ID: 7699811

Claim:
A pre-filled syringe comprising a barrel having a front end and base end which are open, a base end gasket which is in a base end side in the barrel and fluid-tightly slidable in the barrel, a front end gasket which is in a front end side in the barrel and fluid-tightly slidable in the barrel, and a nozzle part provided on the front end of the barrel, the nozzle part comprising a front end gasket accommodation part for accommodating the front end gasket; and two or more liquid flow passages with the base end of one liquid flow passage being separated from the base end of another liquid flow passage by a side wall of the front end gasket accommodation part, each liquid flow passage being a groove concavely provided in the side wall of the front end gasket accommodation part and extending in an axial direction, and each liquid flow passage having a wide part having a gradually widening width in a base end of the side wall, through which a liquid medicine can pass when the front end gasket is accommodated in the front end gasket accommodation part, a sectional area of a front end of each liquid flow passage being smaller than a sectional area of a base end of the liquid flow passage.