The authors reviewed CT findings of 25 burst fractures in 24 patients of 106 spinal trauma and evaluated the degree of spinal canal narrowing and analyzed the retropulsed fragment. 1. The most common location was L1(36%). 2. We agreed with those authors who report no correlation between degree of neurologic impairement and degree of spinal canal narrowing. 3. The burst fractures were classified into stable936%) and unstable fractures(64%). 4. CT analysis of retropulsed fragment ; (1) 52% of retropulsed fragment had a sagittal oriented fracture. (2) 20% of retropulsed fragment has rotated 0-90。 and all rotated fragments demonstrated anterior rotation. (3) Movement of the retropulsed fragment in crania(80%) and caudal(20%) direction (3-7mm) were noted. (4) Fracture extending to region of basevertebral foramen was demonstrated in 20(80%).