Suehiko Shiono (塩野季彦, Shiono Suehiko, 1 January 1880 – 7 January 1949) was a Japanese lawyer, politician and cabinet minister noted for his prosecution of high-profile cases of political crimes and thought crimes under the Peace Preservation Laws of the 1930s Empire of Japan .

As his father died when he was still a child, he was adopted by his uncle, Shiono Giken, who was chief prosecutor of the Tokyo District Court.

Under his tenure, the prosecuted the Teijin Scandal, which brought down the government of Prime Minister Saito Makoto.

Shiono served as Minister of Justice under the Hayashi, 1st Konoe and Hiranuma administrations from February 1937 to August 1939.

As Justice Minister, Shiono was noted for taking concrete action to increase police training in investigative methods, and to curb cases of police brutality and torture[3] In 1946, along with all members of the wartime Japanese government, Shiono was purged from public office and was taken into custody by the American occupation authorities and held at Sugamo Prison.