Sadakazu Tanigaki (?? ??, Tanigaki Sadakazu, born 7 March 1945) is a Japanese politician who served as Minister of Finance from 2003 to 2006 in the cabinet of Jun'ichiro Koizumi.
He also served as Minister of Construction and Transport in the cabinet of Yasuo Fukuda and served his ninth term as a member of the House of Representatives, representing Kyoto's Fifth District.
He was elected as President of the Liberal Democratic Party (LDP) on 28 September 2009, following the party's massive defeat in the 2009 general election.
He was replaced by Shinzo Abe on 26 September 2012.
He was only the second LDP leader who was not simultaneously Prime Minister of Japan.