Pieter Bustijn (Dutch pronunciation: [ˈpitər ˈbɵstɛin]; also Pierre Bustyn or Pieter Buystijn [ˈpitər ˈbœystɛin]; baptized in 1649 – 22 November 1729) 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.