Ernstalbrecht Stiebler (born 29 March 1934 in Berlin) is a German composer of mostly chamber, choral, piano, and organ works. His work has "three principal concerns: sonority, rhythm, and duration" leading "to a large and varied body of work". Stiebler studied composition and piano at the Musikhochschule Hamburg, but had more important lessons at Darmstadt between 1958 and 1961, including studies with Karlheinz Stockhausen in 1959.