The purpose of the research is the applications of various methods of research and study of their results at chronic colostasis in children. Material and Methods: In the Republican Research Centre of Emergency Medical Care in Tashkent since 2006 till the present time in the branch of children’s surgery, 75 children were treated with chronic colostasis at the age of from 3 months till 14 years. With the purpose of the confirmation of the diagnosis, the children were examined according to the standards accepted at the centre: USG, coprological analysis, identification of the intestinal microflora, rectal manual examination, colonofibrocopy, histological investigation of the colon biopsies samples, roentgenocontrast investigation of the colon irrigography, multisliced computed tomography (MSCT) of the colon, definition of anal muscles contractile function. Results and Discussion: In 35 (46.7%) studied children, there was diagnosed dolichosigma, in 14 (18.7%) —dolichocolon or dolichomegacolon, in 14 (18.7%)—Hirschsprung’s disease, in 1 (1.3%)—congenital narrowing of the anal channel, in 1 (1.3%)—Pair’s syndrome, in 10 (13.3%)—functional constipations. Conclusions: Any of known methods at the isolated application does not give absolute reliance of correctness of verification of the diagnosis, especially in heavy cases, at a divergence of clinical findings and data of the patient investigation. Each of methods has the restrictions at application and interpretation of results. The examination of children with chronic constipations should be complex and gradual, and at the subsequent diagnostic stage, the clinician should determine individually in each concrete case.