Kamen Rider Black RX is a Japanese tokusatsu superhero television series produced as part of the Kamen Rider series. The ninth show in the franchise, it is a joint collaboration between Ishimori Productions and Toei Company, and aired on the Mainichi Broadcasting System and the Tokyo Broadcasting System from October 23, 1988, to September 24, 1989. The series is a direct sequel to Kamen Rider Black and the first to feature a team-up with the past Riders since the 1984 TV special Birth of the 10th! Kamen Riders All Together!!. For distribution purposes, Toei refers to this television series as Black Kamen Rider RX.

The Kamen Rider Series , also known as Masked Rider Series, is a Japanese superhero media franchise consisting of tokusatsu television programs, films, manga, and anime, created by manga artist Shotaro Ishinomori. Kamen Rider media generally features a motorcycle-riding superhero with an insect motif who fights supervillains, often known as kaijin .