An auto-injector comprising: an outer housing (12, 14) having a proximal end and a distal end; an inner housing; a cartridge located within said inner housing, said cartridge containing a medicament, said cartridge further comprising a plunger within said cartridge; an actuating assembly comprising an upper member and a lower member, said lower member having an upwardly extending element (52, 54), said upwardly extending element (52, 54) locking with said upper member, a compressed spring extending between said lower member and said upper member, a first trigger being operative to unlock said upwardly extending element (52, 54) from said upper member; said first trigger being located at said distal end, said first trigger being operative to cause activation of said actuating assembly; and a second trigger being located at said proximal end, the arrangement being such that said second trigger must be activated to permit activation of said first trigger, wherein said second trigger is activated by a user pressing the auto-injector against a resilient surface, wherein said actuating assembly is spaced from said first trigger, said second trigger being designed to move said actuating assembly closer to said first trigger to thereby permit said first trigger to actuate said actuating assembly, characterized in that said cartridge having one end thereof sealed by a pierceable member, said pierceable member being a cap, said auto-injector further comprising a needle hub, said needle hub having first and second piercing tips (68, 70), said first and second piercing tips (68, 70) being in fluid communication, said actuating assembly being arranged to move an actuator from a first storage position to an activated position wherein said first piercing tip extends outwardly of said outer housing (12, 14) at said proximal end and said second piercing tip pierces said pierceable member, said actuating assembly further including a plunger rod, said plunger rod engaging said plunger to cause said first piercing tip to extend outwardly of said outer housing (12, 14) and said second piercing tip to pierce said cap of said cartridge, said auto-injector further including a spring biasing said needle hub to a retracted position after deployment thereof. an outer housing (12, 14) having a proximal end and a distal end; an inner housing; a cartridge located within said inner housing, said cartridge containing a medicament, said cartridge further comprising a plunger within said cartridge; an actuating assembly comprising an upper member and a lower member, said lower member having an upwardly extending element (52, 54), said upwardly extending element (52, 54) locking with said upper member, a compressed spring extending between said lower member and said upper member, a first trigger being operative to unlock said upwardly extending element (52, 54) from said upper member; said first trigger being located at said distal end, said first trigger being operative to cause activation of said actuating assembly; and a second trigger being located at said proximal end, the arrangement being such that said second trigger must be activated to permit activation of said first trigger, wherein said second trigger is activated by a user pressing the auto-injector against a resilient surface, wherein said actuating assembly is spaced from said first trigger, said second trigger being designed to move said actuating assembly closer to said first trigger to thereby permit said first trigger to actuate said actuating assembly, characterized in that said cartridge having one end thereof sealed by a pierceable member, said pierceable member being a cap, said auto-injector further comprising a needle hub, said needle hub having first and second piercing tips (68, 70), said first and second piercing tips (68, 70) being in fluid communication, said actuating assembly being arranged to move an actuator from a first storage position to an activated position wherein said first piercing tip extends outwardly of said outer housing (12, 14) at said proximal end and said second piercing tip pierces said pierceable member, said actuating assembly further including a plunger rod, said plunger rod engaging said plunger to cause said first piercing tip to extend outwardly of said outer housing (12, 14) and said second piercing tip to pierce said cap of said cartridge, said auto-injector further including a spring biasing said needle hub to a retracted position after deployment thereof.