| Chișer | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Arad County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Olari |
| Length: | 10km (10miles) |
| Mouth: | Crișul Alb |
| Mouth Location: | Olari |
| Mouth Coordinates: | 46.4018°N 21.5711°W |
| Progression: | Canalul Morilor→ |
| Basin Size: | 41km2 |
The Chișer is a small river in Arad County, Romania. Formerly a left tributary of the river Crișul Alb, it now discharges into the Canalul Morilor, which flows parallel to the south of the Crișul Alb.[1] Its length is 10km (10miles) and its basin size is 41km2. The former lower course of the Chișer is now the Valea Nouă Chișer.