The Australian share market has given up its early gains to close lower, dragged down by the big miners and the telecommunications sector.

The benchmark S&P/ASX200 index finished down 23.1 points, or 0.35 per cent, to 6,530.9 points at 1615 AEST on Monday, while the broader All Ordinaries was down 24.2 points, or 0.36 per cent, to 6,609.4.

The Aussie dollar is buying 68.74 US cents, from 69.02 US cents on Friday.