The women's duet synchronized swimming event at the 2008 Summer Olympics was held from August 18 to 20, at the Beijing National Aquatics Center. 24 duets competed, each consisting of two swimmers, and there were two rounds of competition. The preliminary round consisted of a technical routine and a free routine. Finalists performed a second free routine, adding that score to the preliminary technical routine round score. The technical routine consisted of ten required elements, which had to be completed in order and within a time of between 2 minutes 5 seconds and 2 minutes 35 seconds. The free routine had no restrictions other than time; this routine had to last between 3 minutes 15 seconds and 3 minutes 45 seconds.