Aim of study. To evaluate the effectiveness of closed manual detorsion in case of testicular torsion in children of different age groups. Materials and methods. Manual detorsion was carried out according to the classical technique (Yudin Ya.B. et al., 1987) by 79 patients with a testicular torsion at the age from the neonatal period to 18 years. A comparative analysis of the effectiveness of detorsion depending on various factors (the age of the patient, the duration of ischemia, the presence of a secondary hydrocele) was performed. Results. The effectiveness of the detorsion depended on the duration of the ischemia period before manipulation in patients of all ages. The effectiveness of the detorsion is more pronounced in adolescents, which is due to the more advanced structures of the spermatic cord and the larger testicle mass. A hydrocele of a secondary nature is a factor complicating detorsion, but its puncture emptying increases the efficiency of manipulation. Conclusions. The effectiveness of manual detorsion is directly proportional to the age of the patient and inversely proportional to the duration of ischemia before the manipulation is performed. The frequency of residual torsion does not allow us to consider the method as independent in the treatment of testicular torsion, and ultrasound and ultrasound dopplerography are completely reliable evaluation criteria. The effectiveness of the method allows you to recommend it in the first day of the disease in patients of all age groups, except for newborns, but emergency surgery should be performed as soon as possible after the detorsion. Carrying out a discharge puncture in patients with a secondary hydrocele against a background of testicular vesicle significantly improves the effectiveness of manual detorsion. (For citation: Shormanov IS, Shchedrov DN. Closed manual detorsion in case of a testicular torsion in children. Urologicheskie vedomosti. 2018;8(1):34-39. doi: 10.17816/uroved8134-39).