In standard jumping events of track and field the athlete\'s objective is to obtain a maximum height displacement of the center of gravity in a given direction in the high jump. When the high jump motion is considered as simple projetile motion, the flight distance is determined by the initial state of athlete\'s motion which include the takeoff veritical velocity takeoff angle, the heigh of center of gravity angular momentum at the moment of takeoff. However due to the construction o human hody distinctive movement patterns during the run-up, takeoff, flight, and landing phases are evolved. It was considered that a common movement pattern as well as distinctive movement patterns between athletes mihgt be identified. This study was conducted to investigate the biomechanical relationship between the high jump takeoff motion and flight distance performed by elementary school athletes who achieved at least the 3rd plae in the high jump at the Track and Field meetings during 1998 and 1999 were selected as subjects. The high jump motions performed by the subjects were recorded using 16mm cameras at the nominal speed of 100 frames per second. The Direct Linear Transtormation technique was adopted from the beginning of filming to the final stage of data extraction. It was found that: The mean takeoff vertical velocity of the subjects at the instant of takeoff was 3.234 土 0.272(m/s_ ans the mean height of takeoff of the center of gravity at the instant of takeoff was whih is equivalent to 80.20土2.30% of the mean height or the subjects. The mean takeoff angle at the instant of takeoff was 60.7土6.8, the mean shank angular velocity at the instant of takeoff was -4.536 Within the limitations of this study it is concluded: In order to increse flight height, several conditions must be fulfilled at the instant of takeoff leg touchdown and takeoff during takeoff pahse.