| Official Name: | Pain Shad Deh |
| Native Name: | پايين شادده |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Gilan |
| Subdivision Type2: | County |
| Subdivision Name2: | Lahijan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Lafmejan |
| Population As Of: | 2006 |
| Population Total: | 282 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 37.2083°N 49.825°W |
Pain Shad Deh (Persian: پايين شادده, also Romanized as Pā’īn Shād Deh; also known as Pā’īn Shādeh, Shādeh, and Shady) is a village in Lafmejan Rural District, in the Central District of Lahijan County, Gilan Province, Iran. At the 2006 census, its population was 282, in 110 families.