Forex dealers said a higher opening in the equity market buoyed by Finance Minister P Chidambaram's promise of bringing the economy back on track, also supported the rupee.
The rupee had strengthened by 45 paise to close at a one-month high of 55.07 against the dollar in yesterday's trade, tracking a jump in local shares.
The domestic currency has appreciated by 77 paise in the past three days.
Meanwhile, the BSE benchmark index Sensex rose by 65.02 points, or 0.37 per cent, to 17,666.80.