The Bréguet Br 904 Nymphale (English: Nymph) is a two-seat training and competition sailplane, built in France in the 1950s.

The Nymphale is a two-seat development of the double World Gliding Championships (WGC) winning Br 901 Mouette.

[1] Behind the wings the 904 and the 901 S1 - the two seater has the more angular fin and rudder of the later 801s - are very much alike in appearance, with a tapering fuselage and conventional empennage.

The cockpit, necessarily lengthened, has the same style of fuselage contour following canopy as the 901 but is divided into front and rear sections, the latter stretching back over the wing leading edge.

[5] Two years later it again competed in the WGC, held at Leźno in Poland, this time in the Open class with one seat empty.