Mermaid Melody Pichi Pichi Pitch is a shōjo manga and anime series created by Michiko Yokote with artwork by Pink Hanamori.

The manga was originally published in the monthly shōjo manga anthology Nakayoshi. There are 32 chapters published (including two special stories) and most of them are compiled into seven volumes issued by Kodansha.

The anime series was produced by TV Aichi. The first season of which, composed of 52 episodes, was shown on the TV Tokyo Network from April 5, 2003 to March 27, 2004. A second season, entitled Mermaid Melody Pichi Pichi Pitch Pure, lasted for 39 episodes and was aired from April 3 to December 25, 2004.

ADV Films acquired the license to the anime on June 2004 for its North American release, but was eventually dropped due to difficulty in finding backers and securing a TV airing deal. Although the anime has not since been re-licensed for an English language distribution, Del Rey Manga acquired the rights to publish the manga for the North American audience. It began releasing the manga on April 2006 under the title Pichi Pichi Pitch: Mermaid Melody. This came as an attempt to familiarize English readers with the canonical short form of the title, as other titles have done: for example, Bishōjo Senshi Sailor Moon became Sailor Moon and Kidō Tenshi Angelic Layer has been released in North America as simply Angelic Layer.

Pichi Pichi Pitch is loosely based upon the old Hans Christian Andersen version of "The Little Mermaid" tale, which is about the mermaid who falls in love with a human boy, and transforms into a human to win his heart. In the case of Pichi Pichi Pitch, the old 1950s movie Three Coins in the Fountain is sort of mixed in to the plot as three mermaid princesses come to land to learn about the human world through attending middle school and trying to be idol singers.