Although splenic artery aneurysm is the commonest visceral and third most common intra abdominal aneurysm after aorta and iliac artery, aneurysm of splenic artery along with aneurysm of splenic vein and arteriovenous fistula is a rare entity. Most of them are <3 cm in diameter. Giant true splenic artery aneurysms are rare and very few lesions >10 cm have been reported. We report a case of an 11 cm x 8 cm size splenic artery and vein aneurysm with arteriovenous fistula. To the best of our knowledge, this is the 1st case of giant splenic aneurysm with arteriovenous fistula managed by endovascular treatmen.