Provided is a syringe which does not have a plunger, is small and has excellent portability, and is capable of discharging a drug solution with simple operation. The syringe (10) comprises a tube (30) that is provided with a nozzle (31) on a distal end and an opening (34) on a base end, a gasket (42) that is inserted into the tube (30) and slides by being pressed, and a drug solution (41) that is contained inside the tube (30) between the nozzle (31) and the gasket (42) and is discharged from the nozzle (31) by the sliding of the gasket (42). The syringe (10) further comprises a tube inner magnet (43) that is inserted inside the tube (30) and an opposing magnet (46) that is fixed to the tube (30) or surrounds the tube (30) and produces bias with a magnetic repulsive force that is generated by causing the opposing magnet (46) and the tube inner magnet (43) to oppose each other by like poles to cause sliding of the gasket (42) toward the distal end of the tube (30). At least one of the tube inner magnet (43) and the opposing magnet (46) is locked by the tube (30), and pressing is started by loading up bias until the lock is released or by producing bias after the lock is released.La présente invention concerne une seringue dépourvue de piston, de petite taille, très facilement transportable et qui permet dadministrer, de façon simple, une solution médicamenteuse. Ladite seringue (10) comprend : un tube (30) qui est équipé dune buse (31) au niveau de son extrémité distale et qui comporte une ouverture (34) au niveau de son extrémité inférieure un joint détanchéité (42) qui est placé dans le tube et qui coulisse lorsquil est comprimé et une solution médicamenteuse (41) qui est contenue à lintérieur du tube (30) entre la buse (31) et le joint détanchéité (42) et qui est évacuée par la buse (31) suite au coulissement du joint détanchéité (42). La seringue (10) comprend, en outre, un aimant intérieur de tube (43) qui est placé à lintérieur du tube (30) et un aimant de po
