A dual chamber prefillable syringe (100) includes: a cylinder (10) which has abypass portion (11)； a hub luer-lock (20)； a front stopper (30)； a middlestopper (40) whichseals a preparation (S) together with the front stopper (30)； an end stopper(50) whichseals a solvent (L) together with the middle stopper (40)； a finger grip (60)；and a plungerrod (70) which is connected to the end stopper from the rear end side. Afemale screwportion (64) which is screwed around the axis line is formed on an innercircumferentialsurface of the finger grip (60), and a male screw portion (73) which is ableto be screwedto the female screw portion is formed on an outer circumferential surface ofthe plungerrod (70).
