Abstract: A safe-arm simulator device for use in training personnel in maintaining operating a missile rocket motor fuze safe-arm device of the type presently utilized on live missiles is disclosed. The device comprises a spring mounted on a rotatable shaft contained within a cylindrical housing. The housing is inserted in a bored hole of a dummy missile, exposing a key slot in the base of the shaft. A key is mounted on the device for turning the device from a safe to arm position. The spring offers resistance to turning similarly incurred in a live safe-arm device and likewise returns and maintains the device in a safe orientation unless locked in the arm position.