Relevance. Of particular relevance in recent years has become the problem of psoriasis in children, it is noted an increase in cases of severe psoriasis refractory to traditional drug therapy, which together with a high incidence raises the questions of optimization of therapeutic interventions in this category of patients in the category of social.The purpose of the study. To study the efficacy and safety of UVB-phototherapy 311 nm, tacrolimus from pediatric patients with psoriasis.Material and methods. Under supervision there were 26 patients from 5 to 16 years old. All patients received UVB 311 nm phototherapy. The effectiveness evaluated in accordance with the dynamics of the indexes PASI, BSA, Quality of Life.Results. As a result of the course of UVB-therapy with 311 nm wave-length the number of patients with PASI 100 was 69 %, PASI 90 was 23 %, PASI 75 was 8 %. Index BSA were thus reduced to 81.5 %, DIKE improved by 65.3 %. The tolerance to UVB 311 nm was evaluated as very good. Adverse reactions such as transient erythema was observed in 11.5 % of patients, xerosis in 19.2 %.Conclusion. UVB 311 nm phototherapy is a highly effective and safe method of therapy of medium-severe psoriasis in children.