Sinfonia Concertante for Violin, Cello, Oboe & Bassoon in B-flat major, Hob. I:105

The Sinfonia Concertante in B♭ major (Hob. I/105) by Joseph Haydn was composed in London between February and March 1792. It is believed to be a response to similar works composed by Ignaz Pleyel, a former student of Haydn's who London newspapers were promoting as a 'rival' to Haydn.

The work is a sinfonia concertante with four instruments in the solo group: violin, cello, oboe and bassoon. In addition to the solo group, the Sinfonia Concertante is scored for flute, two oboes, two bassoons, two horns, two trumpets, timpani, and strings.