| Official Name: | Bidak |
| Native Name: | بيدك |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Nehbandan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Shusef |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Shusef |
| Population As Of: | 2006 |
| Population Total: | 102 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 31.8642°N 59.8825°W |
Bidak (Persian: بيدك, also Romanized as Bīdak) is a village in Shusef Rural District, Shusef District, Nehbandan County, South Khorasan Province, Iran. At the 2006 census, its population was 102, in 30 families.