Injection syringe with multi-cavity chamber unit (10) includes longitudinal main body (20), with side wall (210), distal side (230) and distal side (230) opposite proximal lateral (220), the inner space limited between distal side (230) and proximal lateral (220) by side wall (210) and is arranged in the distal openings that distal side (230) be used to be provided out liquid from main body (20). Syringe (10) further includes the separating element (30) being arranged in the inner space of main body (20), so that distal side chamber (240) and nearside chamber (250) are formed in the inner space of main body (20), wherein separating element (30) seals distal side chamber (240) relative to nearside chamber (250). Syringe (10) has the shunting device (260) being arranged in the side wall (210) of the distal side chamber (240) of main body (20). First medical fluid (70) is arranged in the distal side chamber (240) of main body (20), and the second medical fluid (80) is arranged in the nearside chamber (250) of main body (20). Injection syringe with multi-cavity chamber unit (10) allows by injecting sufficiently application multiple-medicinal-liquid (70,80).