The joint range of motion (ROM) is related to flexibility, constituting a physical quality that influences in technical skills and biomechanical economy of movement; however, this physical ability has been little investigated in different sport's disciplines, so they are unknown normative ranges for specialties and competition level, especially related with dominance of the athletes. The shoulder complex of swimmer is submitted to a high number of repetitions, especially overhead, to achieve propulsion and overcome aquatic drag, requiring joint's symmetry of movement, from side to side. PURPOSE: To describe active and passive ROM, testing shoulder complex, identifying differences between side to side, in elite young swimmers that belong to Bogotá State's Team. METHODS: Fifty one healthy young swimmers participated in a cross-sectional study (23 males, 28 females; age: 16.51±1.10 yr; weight: 59.86±7.74 kg; height: 167.32±9.05 cm). We include subjects with no previous shoulder injuries. Seven tests were performed for Active and Passive ROM (flexion, abduction and extension; horizontal adduction and abduction; medial and lateral rotation). Mean ​​and standard deviations (SD) values were calculated by dominant and non-dominant shoulder, for all ROM measurements. We applied paired t-test to determine statistical differences (sd) between dominant and non-dominant shoulder, at p <0.05. RESULTS: Analyzing shoulder active ROM in males, we have found sd for Active medial rotation between dominant (93.74±13.97°) and non-dominant (99.09±16.23°) sides (p<0.05); also sd for Active lateral rotation between dominant (97.83±11.24°) and non-dominant (91.70±6.12°) sides (p<0.0001). In females, we have found sd for Active medial rotation between dominant (87.21±13.91°) and non-dominant (89.5±7.70°) values (p <0.05); also sd for Active lateral rotation between dominant (101.14±9.18°) and non-dominant (97.46±9.74°) values (p<0.003). No sd were found in Active and Passive ROM, for other variables measured. CONCLUSIONS: We found symmetrical shoulder ROM's values, side to side, for elite young swimmers, except for Active medial and lateral rotation, in both genders. Probably, this evidence does not allow load balance and should be considered as a risk factor of "swimmer's shoulder" painful.