| Official Name: | Cheshmeh-ye Mostafa Beyg |
| Native Name: | چشمه مصطفي بيگ |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kermanshah |
| Subdivision Type2: | County |
| Subdivision Name2: | Salas-e Babajani |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Dasht-e Hor |
| Population As Of: | 2006 |
| Population Total: | 160 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 34.6906°N 46.1031°W |
Cheshmeh-ye Mostafa Beyg (Persian: چشمه مصطفي بيگ, also Romanized as Cheshmeh-ye Moşţafá Beyg; also known as Cheshmeh-ye Moşţafá Beg) is a village in Dasht-e Hor Rural District, in the Central District of Salas-e Babajani County, Kermanshah Province, Iran. At the 2006 census, its population was 160, in 32 families.