Erik Patrik Honoré de Laval (28 April 1888 – 9 November 1973) was a Swedish Army officer and modern pentathlete who won a silver medal at the 1920 Summer Olympics.

[3] de Laval was commissioned as an officer in 1909 and was assigned to Svea Artillery Regiment (A 1) in Stockholm as a underlöjtnant.

[3] He competed at the 1912 Stockholm Olympics together with his elder brothers Georg and Patrik, who were also military officers.

[1][5] He became captain of the General Staff in 1923 and was promoted to major in 1931 and to lieutenant colonel in 1935. de Laval served as a military attaché at the Swedish Legation in Warsaw from 1933 to 1937, and he was then assigned to Norrland Artillery Regiment (A 4) in Östersund the same year.

He served again as a military attaché in Warsaw in 1939, was promoted to colonel in 1941, and was then head of the B Department at the Swedish Legation in Berlin from 1941 to 1942. de Laval then served as military attaché at the Swedish Embassy in Washington, D.C. from 1942 to 1946.