King Anxi of Wei (
Chinese: 魏安釐王 or
Chinese: 魏安僖王) (died 243 BC), personal name Wei Yu (
Chinese: 魏圉) was King of
Wei from 276 BC to 243 BC. He was the son of
King Zhao of Wei. He was the older brother of
Lord Xinling (Wei Wuji). In 275 BC, after a
Han general fled to the Wei capital Daliang, King Anxi began a war against
Qin in an alliance with
Qi. Qin forces under chancellor Wei Ran and general
Bai Qi captured 4 cities, besieged Daliang and killed 40,000 people. In 273 BC, with the assistance of
Lord Mengchang of Qi, he began another war in an alliance with
Zhao. The war ended with the deaths of 130,000 people. In 257 BC, he assisted Zhao when its capital
Handan was besieged by Qin forces, at the request of Lord Pingyuan of Zhao, who was married to Xinling's older sister.