Described is an autoinjector (1) comprising a case (2), a syringe carrier (8) slidably disposed within the case (2) and adapted to hold a syringe (3) including a stopper (6), a plunger (12) slidably disposed within the syringe carrier (8) and adapted to apply a force on the stopper (6), and a drive spring (10) disposed within the plunger (12) and biasing the plunger (12) relative to the syringe carrier (8).描述一種自動注射器(1),其係包括一外殼(2),可滑動地配置於該外殼(2)內以及適於保持含有一止動件(6)之一針筒(3)的一針筒載具(8),可滑動地配置於該針筒載具(8)內以及適於施加一力於該止動件(6)上的一柱塞(12),以及配置於該柱塞(12)內以及相對於該針筒載具(8)偏壓該柱塞的一驅動彈簧(10)。