Cardiff and Millwall enter the break 0-0 at the Den, with the hosts having had the better of the goalscoring chances.
Promotion-hopefuls Cardiff City entered the break goalless with Millwall at the Den after being frustrated by an impressive Lions performance.
The Bluebirds, who occupy a playoff position after the season's opening five games, are without key player Craig Bellamy after the Welshman was ruled out with injury.
His absence resulted in a lack of creativity for Cardiff during the opening period as it was Millwall who produced the better chances.
James Henry saw his shot well blocked after fine combination play from forward pair Andy Keogh and Darius Henderson.
Shortly after, defender Alan Dunne struck well from long range, but his effort was collected comfortably by David Marshall.
Cardiff are in search of their third consecutive win.