Music for Strings, Percussion and Celesta, Sz. 106, BB 114 is one of the best-known compositions by the Hungarian composer Béla Bartók. Commissioned by Paul Sacher to celebrate the tenth anniversary of the chamber orchestra Basler Kammerorchester, the score is dated September 7, 1936.

The work was premiered in Basel, Switzerland, on January 21, 1937 by the chamber orchestra conducted by Sacher, and was published the same year by Universal Edition.

As its title indicates, the piece is written for string instruments (violins, violas, cellos, double basses, and harp), percussion instruments (xylophone, snare drum, cymbals, tam-tam, bass drum, and timpani) and celesta. The ensemble also includes a piano, which, due to the hammer mechanisms inside, is also a percussion instrument; the celesta player joins the pianist in some four-hands passages. Bartók divides the strings into two ensembles which, he directs, should be placed antiphonally on opposite sides of the stage, and he makes use of antiphonal effects particularly in the second and fourth movements.

The piece is in four movements: the first and third slow; the second and fourth quick. All the movements are written without a key signature:

Andante tranquillo
Allegro
Adagio
Allegro molto

The first movement is a slow fugue with a constantly changing time signature. The movement is based around the note A, on which it begins and ends. It begins with muted strings, and as more voices enter, the texture thickens and the music becomes louder, coming to a climax on E♭, a tritone away from A. Mutes are then removed, and the music becomes gradually quieter over gentle celesta arpeggios. The movement ends with the second phrase of the fugue subject played softly over its inversion. The first movement can be seen as a basis for material in the later movements; the fugue subject recurs in different guises throughout the piece.

The second movement is quick, with a theme in 2
4 time which is transformed into 3
8 time towards the end. It is marked with a loud syncopated piano and percussion accents in a whirling dance, evolving in an extended pizzicato section, with a piano concerto-like conclusion.

The third movement is slow, an example of what is often called Bartók's "night music". It features timpani glissandi, an unusual technique at the time of the work's composition, as well as a prominent xylophone part. The rhythm of the xylophone solo that opens the third movement is a "written-out accelerando/ritardando" that follows the Fibonacci sequence, the notated rhythm representing 1:1:2:3:5:8:5:3:2:1:1 notes per beat in sequence.

The fourth and final movement, which begins with notes on the timpani and strummed pizzicato chords on the strings, has the character of a lively folk dance.