Hideo Watanabe (渡辺 秀央, Watanabe Hideo, born July 5, 1934) is a Japanese politician of the Democratic Party of Japan and was a member of the House of Representatives and House of Councillors in the Diet (national legislature) from 1976 to 1993 and 1998 to 2010 respectively. A native of Tochio, Niigata and graduate of Takushoku University, he was elected to the House of Representatives in the 1976 general election as part of the ruling Liberal Democratic Party, and re-elected five times before losing his seat in the pivotal 1993 general election.