Barnsley and Millwall are locked in a stalemate at half-time at Oakwell.
The first chance of the half fell to Chris Dagnall for Barnsley but his 25-yard effort went wide of the post.
Andy Keogh then latched on to a James Henry cross for the visitors, however his left-footed shot from around the penalty spot went over the bar.
Barnsley continued to try their luck from distance with Kelvin Etuhu also shooting from well outside the box. He too was unable to work David Forde in the Millwall goal.
John Marquis attempted a spectacular volley with 30 minutes gone, but his effort went well wide of the post.
Neither side was able to break the deadlock and they went in level at the break.