Ernest Jozef Leo van der Eyken (23 July 1913 in Antwerp – 6 February 2010 in Brussels) was a Belgian composer, conductor and violist.
Van der Eyken also studied counterpoint and fugue with August de Boeck, instrumentation with Paul Gilson, and during World War II went to Salzburg, Austria to study conducting with Clemens Krauss and Joseph Marx at the International Conducting School.
Thereafter, he played in orchestras and chamber music ensembles of Antwerp: Orkest van de Koninklijke Vlaamse Opera (Orchestra of the Royal Flemish Opera), Nieuwe Concerten and Orkest van de Dierentuinconcerten.
He founded the Philharmonisch Kamerorkest (Philharmonic Chamber Orchestra) in Antwerp was also the conductor.
Van der Eyken's œuvre consists of approximately 120 works, his style largely influenced by Flemish post-romanticism and the first wave of modernism of the 20th century.