The purpose of this study was to investigate the effects of 6-week exercises performed by elastic resistance band on functional performance (balance, agility, hand grip strength and flexibility) in children aged 8-9 years. So, 102 students participated in this study according to pre-test and post-test design. Participants were divided into two groups: experimental group (n=50, height: 134.0 ± 6.3 cm, mass: 30.9 ± 7.9 kg, age: 8.6 ± 0.5 years) and control group (n=52, height: 135.0 ± 6.2 cm, mass: 32.4 ± 5.9 kg, age: 8.6 ± 0.6 years). The experimental group performed exercises using elastic resistance bands of lightness grade at the same time of day (45 minutes/day, 3 days/week), and the control group did not participate in any physical activity. Balance was measured by Flamingo Test, agility by Ilinois, flexibility by sit and reach box and strength was measured by hand-grip dynamometer. It was determined that 6-week exercises performed by elastic resistance band increased significantly the hand grip strength; however there was no statistically significant effect on balance, agility and flexibility abilities. The inclusion of elastic resistance band exercises in the context of school activity programs can improve children's strengths. For this reason, exercises performed by elastic resistance bands for more than 6 weeks can be added to activity programs in school as an economical, fun and reliable way to improve the hand-grip performance of children.