Peter Planyavsky (born 9 May 1947) is an Austrian organist and composer. He attended the Schottengymnasium. After graduating from the Vienna Academy of Music in 1966 he spent a year in an organ workshop, and has been instrumental in organ-building projects, notably the construction of the Rieger organ in the Great Hall of the Wiener Musikverein. In 1968 he was appointed organist in the Upper Austrian Stift Schlägl, and the following year organist at Vienna's St. Stephen's Cathedral. From 1983 until 1990 Planyavsky was their director of music, with overall responsibility for church music at the cathedral.