Lionel Henry Daiches (8 March 1911 – 11 November 1999), was a Scottish QC and Liberal Party politician.
Daiches was the son of Dr Salis Daiches, a rabbi of the Edinburgh Jewish congregation. He was educated at George Watson's College and Edinburgh University. In 1947 he married Dorothy Estelle Bernstein. They had two sons. His younger brother David Daiches was a noted writer. He also had a sister, Sylvia Daiches.
Daiches practised as a solicitor before being admitted a member of the Faculty of Advocates in 1946. He became a QC in 1956.
Daiches wrote many articles arguing the identical nature of Bolshevism and Fascism. He was Liberal candidate for the Edinburgh South division at the 1950 General Election. It was not a promising seat and no Liberal had contested the division since 1929. In a difficult election year for the Liberals, he came third;
He did not stand for parliament again.