The Prix du Cadran is a Group 1 flat horse race in France open to thoroughbreds aged four years or older.

It is run at Longchamp over a distance of 4,000 metres (about 21⁄2 miles), and it is scheduled to take place each year in early October.

The event is named after a clock face (cadran) at the École Militaire, a building located alongside its original venue, the Champ de Mars.

The Prix du Cadran was re-opened to horses aged five or older and cut to 4,000 metres in 1913.

The present system of race grading was introduced in 1971, and the Prix du Cadran was classed at the highest level, Group 1.