Potato futures for June fell by Rs 8.20, or 0.81% to Rs 1,007.80 per quintal in 26 lots.
At the Multi Commodity Exchange (MCX), the May contract moved down by Rs 7.80, or 0.77% to Rs 1006.70 per quintal in 90 lots.
Prices fell as traders trimmed their positions after fall in spot market demand against increased supplies from producing belts.