Miho Nikaidō (二階堂 美穂 aka 二階堂 ミホ, Nikaidō Miho, born April 3, 1966) is a Japanese actress.

In 1996 she was engaged to US director Hal Hartley who had recently cast her in his movie Flirt. They later married and began collaborating on projects involving both film and stage including an opera shown at the Salzburg Festival.