Doing regular sports in the sportive competitions may effect motor development of contestant children positively. The aim of research was to investigate the effect of the regular sportive exercise on the development of 10-11 years old children’s motor skills. Participants were chosen from the children competing in interscholastic basketball (n=30) and badminton (n=30) competitions and sedentary children (n=30) in the education year 2012-2013 in Kutahya. In research, the measurements of children’s motor proficiency was assessed by using the BOTMP-2 Short Form (Bruiniks-Oseretsky Test of Motor Proficiency, Second Edition). The BOTMP2-SF involves only 14 of the 46 items of the full test battery. The evaluation was done in 8 sub-tests (Fine Motor Precision, Fine Motor İntegration, Manual Dexterity, Bilateral Coordination, Balance, Running Speed and Agility, Upper-Limb Coordination, Strength). Collected data was analysed using one way analysis of variance (ANOVA) and post doc analysis was performed using Tukey’s multiple range test. According to test results, significant differences were found between the groups in 8 sub-tests. Consequently, it was found that doing regular exercise effects positively motor development of 10-11 years children.