This study was conducted to investigate the technical structure of the javelin throwing and to improve the training and coaching. The subjects of this study were six male javelin throwers participated in the 81th national sports competition. The actual javelin event was taken by video camera. The analyzing factors were throwing angle, throwing velocity, throwing height, time, moving displacement of COG, segmental velocity and angle, rotating angle of the trunk. The conclusions were as follows. 1. It was showned that throng height was 85.6±3.9 and javelin was released to adquative degree, Among the athlets, S3 who had the best record was released the javelin with the fastelocity, but throw the javelin with the less releasing degree. 2. the longer distance the athletes record, the shorter time they had. the shorter time the athletes throw javelin, the longer distance they throw javelin. 3. It was showned that the displacement of the C.O.G of the vertical movement was small in phase 1 and large in phase 2, throwing movement. 4. It was showned that the velocity of the upper segment was faster in distal segment, and then athlets who had the best record was fast in upperarm and forearm but trunk.