Gustav Richard Heyer (29 April 1890 – 19 November 1967) was a Jungian psychologist, "the first significant person in Germany to be attracted to Jung's psychology".
In 1918 he married Lucie Grote, a masseuse, dancer and student of Elsa Gindler.
Later, he joined the Nazi party in 1937, and in 1939 went to Berlin to teach and see patients at the Goering Institute.
Although apparently not personally anti-Semitic - in September 1938, for example, he wrote a warm letter of recommendation for the Jew Max Zeller, who had been in analysis with him that year before being interned in a camp - Heyer remained a member of the Nazi Party until 1944.
After the war Jung denounced Heyer for his Nazi past, and refused ever to meet with him again.