The men's K-1 slalom competition in canoeing at the 2008 Summer Olympics took place between August 11 and 12 2008 at the Shunyi Olympic Rowing-Canoeing Park in Beijing. The K-1 (single kayak) event was raced by one-man kayaks through a whitewater course. The semifinals consisted of a single run. The field was narrowed to the top 10 scores from that run; those 10 boats advanced to the final. The times from the final were added to the semifinal score to give an overall total.