Fumio Watanabe (渡辺文雄, Watanabe Fumio) (October 31, 1929 – August 4, 2004) was a Japanese actor most known for his work with Japanese New Wave director Nagisa Oshima. He was born in Tokyo and graduated from the University of Tokyo before joining the Shōchiku studio in 1956.

He was a friend of C. W. Nicol.^{[citation needed]}