| Peschanaya | |
| Mouth: | Ob |
| Mouth Coordinates: | 52.4208°N 84.8303°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 276km (171miles) |
| Basin Size: | 5660km2 |
The Peschanaya (Russian: Песчаная) is a left tributary of the Ob. It flows through Altai Krai and Altai Republic in Siberia.
It originates approximately 25 kilometers south-east of the village of Besh-Ozek on the slopes Seminsky Range at an altitude of about 1700 m. It joins the Ob 13 km below the confluence of the Biya and Katun. It is long, and has a drainage basin of .