Giant superior vena cava (SVC) aneurysm in obstructive supracardiac total anomalous venous connection (TAPVC) is rare, and there has not been a giant SVC aneurysm reported in non-obstructive TAPVC. Here we reported a 29‐year‐old female with non-obstructive TAPVC and a giant SVC aneurysm. Routine TAPVC correction and partial venoctomy were done, considering that such a giant aneurysm in a non-obstructive venous arch might have its histological etiology and higher risk of thrombosis and/or rupture.