The 30-share index, which had gained 208.80 points in the previous session, fell 18.19 points, or 0.05 per cent, to 34,038.64 in early trade today.
Technology, power and metal stocks were leading the fall in early trade.
Major losers were Wipro, Hindustan Unilever, TCS, NTPC, HDFC Ltd, ICICI Bank, Hero MotoCorp and Bajaj Auto, falling up to 0.88 per cent.
However, L&T, SBI, Bharti Airtel, Tata Motors, ITC Ltd, Sun Pharma, Maruti Suzuki, Infosys and Asian Paint were trading in the positive zone.
Traders said profit-booking emerged in stocks that logged gains recently in absence of cues from other Asian markets that were closed for public holiday today.
The US Dow Jones Industrial Average closed 0.48 per cent down on the final day of 2017 on Friday.
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