The 110 metres hurdles event at the 2005 World Championships in Athletics was held at the Helsinki Olympic Stadium on August 10, 11 and 12.
The top three runners in each of the initial six heats automatically qualified for the semifinals.
The next six fastest runners from across the heats also qualified.
There were three semifinal heats, and only the top two from each heat plus the next two fastest runners advanced to the final.
AR denotes area record NR denotes national record.