Jet fighter could lost control due to mechanical failure or human factors. Top three causes led to ejection are engine failure, air collision, and fire/explosion. Under these circumstances, pilots must trigger the ejection system immediately to save their lives. Major factor negatively correlated with survival is delayed time to eject. Under emergency situation, pilots attempted to eject have better survival rate than those without apparent ejection attempt. In addition, correct ejection posture could decrease ejection related injuries, especially spinal fractures. Survivors from ejection recommended that pilots be familiar with the process of ejection by training with ground-based ejection simulators. Aviation Physiology Research Laboratory, Kaohsiung Armed General Hospital Gangshan Branch had set up an ejection seat trainer since 2002. This equipment allows pilots to repeatedly practice standard procedures for operating ejection and correct posture during the process to avoid injury.