An autoinjector has a body portion (10 12) containing a syringe (13) or cartridge with a needle at its forward end the autoinjector having a drive arrangement (60...) for effecting operation of said autoinjector and including a drive element that moves from a first position to a second position during said operation said body including a first (10) and a second body portion (12) connected together by a snap fit arrangement including a resiliently moveable latch finger (138) on one of said body portions that cooperates with a latch surface (142) on the other thereof to hold the two portions connected wherein said drive element in said second position (60) limits or prevents resilient movement of said moveable latch finger (142) thereby preventing disconnection of said first and second body portions after operation.
