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Copper futures for April declined by Rs 1.20, or 0.29%, to Rs 426.50 per kg in 1,454 lots.
At the Multi Commodity Exchange (MCX), the June contract fell by similar margin to Rs 432.20 per kg in a 84 lots.
Prices were affecred as speculators trimmed their positions amid weak global market trends.
Besides, rising stockpiles of metal monitored by the London Metal Exchange (LME) also put pressure.
Concern that policymakers will expand efforts to cool the housing market in China; world's biggest consumer, put pressure on copper futures trade.
On LME, copper three-months' contract traded 0.50% lower at $7,787.50 per tonne.
Meanwhile, stock piles of copper monitored by LME, up 63% this year, increased 0.5% today to 5,20,500 tonnes, the highest since March, 2010.
Inventories have risen for 20 straight days, the longest streak since January 2010.
