Václav Rais competed in épée fencing at the 1936 Berlin Olympics. Nothing else is known of his fencing career. Rais was born in Litvinov in the Sudetenland, and during World War II, he joined the Czech Army, but then was forced to join the Wehrmacht. Rais was the brother of 1936 Olympic fencer Carmen Raisová.
After the war Rais married and had a son, but then fell on hard times. He turned to alcohol and in the 1960s his wife divorced him and took their son. Rais became homeless and then lived for a while with his sister in Horní Jiřetín, but was moved to a nursing home in Janová, in the Vsetin District of the Zlin Region in July 1985. He eventually died there.