| Chembar | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length Km: | 78 |
| Mouth: | Vorona |
| Mouth Coordinates: | 52.9793°N 43.1787°W |
| Progression: | Vorona→ |
| Basin Size Km2: | 2010 |
| Tributaries Right: | Maly Chembar |
The Chembar (ru|Чембар) is a river of Penza Oblast, Russia. It is a left tributary of the Vorona. It is 78km (48miles) long, and its drainage basin covers 2010km2.[1] Upstream from its confluence with the Maly Chembar near Belinsky, it is called Bolshoy Chembar.