Shimshon Unichman (Hebrew: שמשון יוניצ'מן, 13 February 1907 – 21 March 1961) was an Israeli politician who served as a member of the Knesset for Herut between 1955 and 1961.

Born in Lutsk in the Russian Empire (today in Ukraine), Unichman studied medicine at university in Prague and was certified as an MD.

In 1935 he made aliyah to Mandatory Palestine, where he became commander of a Betar mobilisation platoon in Rosh Pinna.

After independent in 1948 he joined Herut, and was elected to the Knesset on the party's list in 1955.

[1] Streets in Tel Aviv and Kiryat Shmona are named after him.