Andrea Valentini (born December 10, 1977 in Rome) is an Italian modern pentathlete.
He won a bronze medal in the men's team event at the 2004 World Championships in Moscow, Russia.
Valentini is a member of the modern pentathlon team for Gruppo Sportivo Fiamme Azzurre, and is coached and trained by Luigi Filipponi.Valentini first competed for the men's modern pentathlon at the 2004 Summer Olympics in Athens.
Valentini recorded the slowest time of 2:18.34, when he finished thirty-second in freestyle swimming, but he quickly moved to the top position with a sixteenth-place finish in show jumping segment.
In the end, Valentini successfully finished the event in nineteenth place with a score of 5,084 points.At the 2008 Summer Olympics in Beijing, Valentini qualified as a 30-year-old for the second time in men's modern pentathlon, along with his teammate Nicola Benedetti.
He managed to improve his performance by recording his fastest time of 2:11.70 in freestyle swimming, and by completing the show jumping segment with less obstacle and time penalties.
Valentini's best result in the last round was insufficiently enough to reach the top position, finishing only in seventeenth place with a score of 5,288 points.