The present invention refers to a kind of handheld injection device, including a shell (10 And dosage indicator (90 410) 480) in axial direction by shell (10 It 410) and can be relative to the shell (10 410) dosage distributes during dosage setting. The dosage indicator (90 It 480) may include flexible latch arm (95 482) it, is only removed in distribution, it is radial first, and when device reaches its minimum dose (zero) position, along the second opposite radial direction.