jan kleinbussink (born 1946) is a dutch classical musician who specializes in the performance of old music. he is the cantor-organist of the central church in deventer, also known as the lebuïnus church. he is also well known for his contributions as an instrumentalist and conductor to recordings of j.s. bach, buxtehude, charpentier, graupner, händel, w.a. mozart, and telemann.