Provided is a syringe-type ejector which ejects contents (C) in small portions and for which manipulability has been improved. This syringe ejector (1) includes a syringe (2) and a plunger (3), the plunger including a first shaft member (3a) having a piston (4) at its tip, and a second shaft member (3b) that fits with a tube portion (3a9) of the first shaft member. The first shaft member has an elastic piece (3a1) that extends rearward, the elastic piece being provided with a sliding projection (3a2) that is slidable along an inner circumferential surface (2f) of the syringe and a locking projection (3a3) that locks to a rear end (2d) of the syringe. The second shaft member has a pressing axis (3b4) that fits with the tube portion, the pressing axis being provided, at the tip, with an end surface (3f1) that presses a free end of the elastic piece, and being provided, on an outer circumferential surface, with an engaging projection (3b2) that engages with a locking portion (3a8) of the tube portion to prevent removal from the tube portion. The locking projection is locked to the rear end of the syringe by the pressing force from the end surface and the locking of the locking projection is released by relieving the pressing force.L'invention concerne un éjecteur du type seringue qui éjecte des contenus (C) en petites quantités et pour lequel la maniabilité a été améliorée. Cet éjecteur de seringue (1) comprend une seringue (2) et un piston (3), le piston comprenant un premier élément tige (3a) doté d'un piston (4) à son extrémité, et un second élément tige (3b) qui s'adapte à une partie tube (3a9)du premier élément tige. Le premier élément tige comporte une partie élastique (3a1) qui s'étend vers l'arrière, la partie élastique étant pourvue d'une saillie coulissante (3a2) pouvant coulisser le long d'une surface circonférentielle interne (2f) de la seringue et une saillie de verrouillage (3a3) qui se verrouille sur une extrémité arrière (2d) de la seringue. Le second é
