| Official Name: | Chehel Qez va Siah Darreh |
| Native Name: | چهل قزوسياه دره |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Tehran |
| Subdivision Type2: | County |
| Subdivision Name2: | Pakdasht |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Hesar-e Amir |
| Population As Of: | 2006 |
| Population Total: | 875 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.5683°N 51.6614°W |
Chehel Qez va Siah Darreh (Persian: چهل قزوسياه دره, also Romanized as Chehel Qez va Sīāh Darreh; also known as Sīāh Darreh and Chehel Qez) is a village in Hesar-e Amir Rural District, in the Central District of Pakdasht County, Tehran Province, Iran. At the 2006 census, its population was 875, in 201 families.