Acute lymphoblastic leukemia is one of the groups of most challenging malignant neoplasms of hematopoietic tissue. Despite the success in achieving remission induction in primary patients, later, most of them develop disease relapses. Overall and disease-free survivals have to be improved, which cannot be achieved solely with chemotherapy intensification. The new target drugs and cell technologies improve the treatment options for the resistant forms and relapses of acute lymphoblastic leukemia. The effective use of new drugs presupposes their timely assignment which can be ensured by their availability in routine clinical practice. The provided case report describes the successful use of bispecific antibody blinatumomab for treating an early relapse of acute lymphoblastic leukemia in the clinical practice within the municipal healthcare system.