Extending its record-run, the 30-share index spurted by another 103.99 points, or 0.37 percent, to quote at new lifetime high of 27,969.82 in early trade today, breaching its previous intra-day high of 27,894.32 touched on Friday.
The gauge had gained 1,112.93 points in the past four sessions.
On similar lines, the National Stock Exchange index Nifty moved up by 28.40 points, or 0.34 percent, to trade at new high of 8,350.60, surpassing its previous intra-day high of 8,330.75 reached on Friday.
Brokers said continued buying by funds as well as retail investors on the back of a slew of economic reforms undertaken by the government recently and better-than-expected corporate earnings amid a firming overseas trend after Bank of Japan said it would ramp up its own stimulus programme to kick-start growth, mainly buoyed trading sentiment.
Globally, US Dow Jones industrial average gained 1.13 percent to close at record high in Friday's trade.