Background: To my knowledge, no previous studies have examined the appearance of injury in young floorball players. Aim: To investigate the occurrence of overuse injuries in lower extremity (LE) in floorball players aged 15 or younger, with respect to frequency, location, and consequence of injury. Method: Fifty-seven players participated (mean age 11±2 years). A modified version of Oslo Sports Trauma Research Center Overuse Injury Questionnaire was submitted every fourth week during four months in order to record the occurrence of overuse injuries in LE. Result: A total of 42 overuse injuries in 42% (24/57) of the cohort were found. The average monthly prevalence for all players, in any anatomical area, was 28% (95% confidence interval 18%-38%). The most common location of injuries was the knee (43%), followed by the foot (40%). A weak positive and significant correlation (rs = 0.276, p = 0.038 ) between overuse injuries and age was found. Conclusion: The present study shows, in accordance with other recent studies on children and adolescents, that overuse injuries seems to be a common problem for young floorball players.