Pieter Bustijn (also Pierre Bustyn or Pieter Buystijn) was a Dutch composer, organist, harpsichordist and carillon player of the Baroque period. Bustijn occupies a very minor place in music literature: only one of his works, in fact, has been discovered, the IX Suittes pour le Clavessin. This work, one opus number, was printed in Amsterdam in 1712 by the famous publisher Estienne Roger. The reason for the lack of biographical details about Bustijn's life and music can be attributed to the loss of the greater part of the Middelburg archives in 1940.