Objectives: It is known that children with ADHD have deficit in executive abilities and attention. We have revealed that body-oriented training has positive effect on executive abilities in 6-7 years age children with ADHD (Kiselev & Parshakova, 2018). The goal of this study was to reveal the effect of breathing training on attention in 6-7 years of age children with ADHD. We compared the efficacy of two methods of treatment (breathing training for children vs. conventional motor exercises) in a randomized controlled pilot study. Methods: 14 children with ADHD between 6 and 7 years of age were included and randomly assigned to training conditions according to a 2×2 cross-over design. The training included breathing exercises from yoga. Both groups of children have participated in 12 weeks of training (breathing training vs. conventional motor exercises). A total of 36 training sessions lasting 30 minutes were performed. We used 3 subtests from NEPSY (Auditory Attention and Response Set, Visual Attention, Statue) to assess attention in children. Results: Effects of training were analyzed by means of an ANOVA for repeated measurements. The ANOVA has revealed (p<.05) that for all used subtests (Auditory Attention and Response Set, Visual Attention, Statue) the breathing training was superior to the conventional motor training, with effect sizes in the medium-to-high range (0.51-0.89). Conclusions: The findings from this pilot study suggest that breathing training has a positive effect on attention in 6-7 years age children with ADHD. However, it is necessary to do further research into the impact of breathing training on ADHD children.