In Korea, the number of In-line skaters has been explosively increasing to 4 million as of 2004. In-line skating has been a popular and international sport that everyone can enjoy regardless of sex or age, with a wide variety of events. Even so, measures to prevent safety problems are urgently needed. Medical record of CPSC by using NEISS during Dec. 1-31, 2003 from 1992 Aug. lin the US is a good example for Korea how to take actions concerning safety. Injuries of head, wrist, elbow, and knee compose 43.9% of all cases, and which can be prevented by using helmet and three-pack protective gear. The rate of dangerous accidents while inline skating (0.37%) is much lower than any other sports games such as basketball (2.34%), cycling (1.08%), golf(0.26%). Accidents are obviously happened to teenagers(51.4%) and under teenagers(21.3%). These accidents take place about three times more with boys than girls. The most highly damaged parts of player’s body are wrists and lower arms. There are following symptoms ; fracture(42.6%), sprain(18.1%), contusion(17.7%), and laceration(10.7%). The injury of head will possibly cause into the brain damage by 58.2%. In addition, these accidents are not related to the equipments(skates) conditions. The places where accidents are happened are sidewalk and street (26%), running street (22%), bike path in public park (19%), house (10%), parking lot (9%), others (14%). The following conditions are directly related to these accidents ; 1) dangerous street (63%), skate control ability (67%), darkness (6%), physical condition(fatigue or exhaustion) (37%), by the way, indirectly dangerous street (53%), skate control ability (25%), darkness (17%), physical condition(fatigue or exhaustion) (11%). According to the results of this study, the equipment of protective gear during skating or education must be strongly recommended. In short, helmet and three pack head gear are vital when inline skating. Equipment of these will have a great effect on the prevention of injuries. 1)It is very necessary to make sure to wear. helmet, 3 safety protect pack or brace when young people under 10years old play In-line skating. 2)Safety-education for young people including adolescence is needed very seriously and the program and guideline of safety education is reguired. 3)The following study is required focusing on the direct and indirect risk factor, environmental factor and skating attitude causing safety accidents.