This study is purposed to analyze long jump techniques at run up, take off, and landing. For the purpose, 8 long jumper`s motion was filmed in 16mm cine film at the speed 100 frame/sec. All the subjects are the 1st grade high school boys who can jump longest distance in their school. From the result of analysis, following conclusions can be derived. 1) There is not standard run up distance, but that is depended to his ability of how many percent to his maximum speed can he control. 2) The rythm of last 4 strides are like as □ □ □ □. 3) The run up speed was about 10∼11m/sec, and the take off velocity was about 7.58∼8.57m/sec. 4) The take off movement has two functions, moderating the run up impulse and converting the run up speed to vertical. And the most of the vertical take off velocity is attained by converting the run up speed, only a little is attained by leg muscle`s contaraction (the efficiency index was 1.02∼1.06). 5) The subjects lost their jumping distance about 30∼137cm (mean 71cm), for landing on foot, not by hip.