Abstract: A disposable syringe apparatus with retractable body entering conduit which reduces the frequency of accidental needle strikes to health care workers and prevents health-threatening reuse of the syringe by drug abusers. The device includes a cylinder having an open proximal end, a closed distal end, and a body entering conduit projecting through the distal end. A piston assembly is included having a member at its distal end for engaging the aperture at the proximal end of the body entering conduit following expulsion of fluid materials. The piston is then withdrawn proximally through the cylinder relocating the body entering conduit fully within the interior of the cylinder. The body entering conduit and piston are locked in place by a member for a tapering cam on the exterior of the piston and retainers on the interior of the cylinder.