The spleen is the most common intraabdominal organ injured in blunt trauma, Although physical signs andsymptoms, coupled with abdominal paracentesis & peritoneal lavage confirm intraabdominal injury, but isolatedsplenic injury especially delayed rupture, the diagnosis and clinical course is variable. We are reevaluation ofplain roentgenologic findings for the light of early diagnosis of isolated splenic injury. 24 patiens of theautopsy and surgically proven isolated splenic injury at Chosun University Hospital in the period from 1980January to 1986 June were analyzed plain roentgenogram retrospectively. The results were as follows: 1. Malepatients predominate, constitution 87.5%. Incidence has been greatest in second to fourth decade. 2. Mode oftrauma causing isolated splenic injury is most common in motor vehicle accident and others are fall down, struckby fist, blow to object, uncertain blunt trauma. 3. Delayed rupture of spleen occured in 2 cases(8.3%). 4. Commonpatterns of splenic injury is simple laceration that involves both the capsule and the parenchyma and a lacerationthat involves the splenic pedicle. 5. Plain chest roentgenographic findings were abnormal in 4 cases (16.7%). Themost common plain abdominal roentgenographic findings was the evidence of intraabdominal fluid in 21 cases(87.5%).The others are included in order of frequency: gastric dilatation, prominent mucosal folds on greater curvature ofthe stomach, evidence of pelvic fluid, displacement of stomach to the right or downward, mass density in theregion of spleen. 6. No relationship can be shown between patterns of injury, time lapse after trauma and plainroentgenological findings. But the evidence of intraabdominal fluid is most important in the light of earlydiagnosis. 7. Diagnosis of splenic injury may be most helpul that in combination with clinical history, clinicalsymptoms & signs and plain film findings. In delayed rupture, diagnostic value of serial examination and surgicalobservation is emphasized.