The purpose of this paper is to reveal the influence of sensorimotor coordination development on the technical execution of balance beam dismounts in the case of junior gymnasts aged 12 to 15 years. This scientific approach led to the organization of an experimental study, included in a postdoctoral research carried out in 2012-2014. To achieve the purpose and objectives of the research, we used the following methods: review of specialized literature; pedagogical observation method; pedagogical experiment method; tests method; video computerized method of biomechanical analysis; method of movement postural orientation; statisticalmathematical method and graphical representation method. In this study we used 3 tests of assessment of sensorimotor coordination development: test 1 – standstill landing; test 2 – test ―Briuk‖ and test 3 – static-kinematic stability. Biomechanical analysis was performed using Physics ToolKit program and the method of movement postural orientation, focusing on sports technique key elements of balance beam dismounts. The results of the study highlight the level of sensorimotor coordination development of junior gymnasts aged 12 to 15 years regarding the spatial-temporal coordination, vestibular coordination and balance; the kinematic and dynamic analysis of the key elements of sports technique in terms of body segments trajectories, angular speed and force momentum during dismounts off balance beam; it is also presented the dynamics of sports performances achieved in competitions as for the difficulty score, execution score and final score. Concerning the correlation of sensorimotor coordination indicators with performance results on balance beam, there are significant differences, which confirms the influence of the sensorimotor coordination on junior gymnasts‘ technical training on balance beam. Likewise, the assessment of sensorimotor coordination in accordance with the biomechanical analysis of beam dismounts sports technique in the case of junior gymnasts reveals its influence on the technical training and performances obtained in competitions.