| Beu | |
| Name Other: | Beu Sec |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Caraș-Severin County |
| Length: | 19km (12miles) |
| Mouth: | Nera |
| Mouth Coordinates: | 44.9021°N 21.7472°W |
| Basin Size: | 53km2 |
| Tributaries Left: | Beușnița |
| Tributaries Right: | Seleștiuța, Chichireg |
The Beu is a right tributary of the river Nera in Romania. It discharges into the Nera upstream from Sasca Română.[1] Its length is 19km (12miles) and its basin size is 53km2. The upper reach of the river is also known as Beu Sec or Răcăjdianu.