Biache-Saint-Vaast is a commune in the Pas-de-Calais department in the Hauts-de-France region in northern France.
A small farming and light industrial town located 8 miles (13 km) east of Arras, on the banks of the Scarpe river, at the junction of the D42, D43 and D46 roads. The A26 autoroute passes by just yards from the commune. Biache-Saint-Vaast station has rail connections to Arras and Douai.
Biache-Saint-Vaast is well-known for an eponymous Middle Palaeolithic archaeological site immediately to the south of the town on the left bank of the Scarpe River, produced by Neanderthals dating to around 240,000 years ago (MIS 7) showing evidence for the use of fire and the butchery of aurochs, narrow-nosed rhinoceros, and brown bear. Neanderthal bones have also been recovered from the site.