| Bever | |
| Mouth Location: | Weser |
| Mouth Coordinates: | 51.6569°N 9.3772°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | North Rhine-Westphalia |
| Length: | 10.5km (06.5miles) |
Bever is a river of North Rhine-Westphalia, Germany. It flows into the Weser in Beverungen.
On December 1, 2006, the water became contaminated after a slurry accident. A fist-sized crack in the fermenter of the Biogas Plant in Borgentreich-Natzungen brought large quantities of fermentation substrate into the Eselsbach and thus into the Bever, causing a massive fish die out. Trout, eels, grayling, crayfish, and other aquatic animals died, which also affected the adjacent fishpond sites.