Of the conventional P-A and A-P chest films which have been studied, many roentgenologic signs suggested for chest trauma. In the present study, an effort was designated to further clarify the X-ray findings of the nonpenetrating extracardiac chest injuries and to observe the X-ray findings being a leading maneuver of surgical procedure. Fat embolism and shock lung must be kept in mind on follow up films. The results thus obtained are summarized as follow; 1. Most of cases are visualized between the age of 10 and 50 and more common in male. 2. Those denoting rib fracture, hemopneumothorax, and lung contusion are direct roentgenologic signs. 3. In case of serious result which showed pulmonary edema patten on conventional chest films, we thought fat embolism or shock lung to be the cause of death.