To present the description of case series of successful surgical treatment of upper limb aneurysms in children. The case series included 2 boys and 3 girls, with median age 3.3 years. One of them was a newborn with a true brachial artery aneurysm. Aneurysms were in the brachial ( n = 3) and radial ( n = 2) arteries. Two patients had idiopathic aneurysms. Two cases were associated with connective tissue dysplasia syndrome. One patient had a history of trauma. In 4 of 5 cases, there was a true aneurysm and in one a pseudoaneurysm. Diagnosis was carried out in all cases by using ultrasound, with arteriography in one case. All 5 children were operated on. Resection of the aneurysm and restoration of arterial patency was performed in 4 of 5 cases (ligation of the radial artery near the aneurysm in 1 case, aneurysm resection with end-to-end anastomosis in 1 case, resection with PTFE graft implantation in 1 case, and resection with implantation of an autovenous graft in 2 cases. Complications. Dysfunction and thrombosis of the PTFE graft required reoperation using an autovenous graft.