The exchange opened for the evening session as it remained closed in the morning for 'Id-Ul Fitr'.
Besides, subdued demand from consuming industries at domestic spot market weighed on copper prices.
At the Multi Commodity Exchange, copper for delivery in August fell by Rs 5.70, or 1.74 per cent to Rs 322.60 per kg in a business turnover of 5,144 lots.
Similarly, the metal for delivery in far-month November traded lower by Rs 5.50, or 1.64 per cent to Rs 329.05 per kg in 67 lots.
Meanwhile, copper for delivery in three months slipped 1.6 per cent on the London Metal Exchange in yesterday's trade.