Acute cholecystitis in children and adolescents is unusally rare especialy the gangrenous inflammation. Only a few cases are reported in medical literature and each publication of such a case is a contribution to the further understanding of the clinical picture and diagnosis of this rare childhood disease. Special attention must be given to the early discovery of acute cholecystitis and early surgical intervention because if the pocess gains a foothold it can cause complications which can be life threatening. The treatment consists of an early cholecystectomy in which case the prognosis is good and the mortality rate is very low.