Mini-Moni (ミニモニ。, stylized as mini-moni.) was a sub-unit of the Japanese idol girl groups Morning Musume and Coconuts Musume. It was formed by Up-Front Promotion in 2000 and associated with Hello! Project. The group was founded by Morning Musume members Mari Yaguchi, Nozomi Tsuji, and Ai Kago, with Coconuts Musume member Mika Todd later added as a member. After Yaguchi's departure, Morning Musume member Ai Takahashi was added into the group.
Throughout their career, Mini-Moni enjoyed success among children, having two animated series from 2001 to 2002, variety shows, as well as a 2002 film based on their stage personas titled Mini-Moni the Movie: Okashi na Daibōken!. In addition to that, they also appeared in several Hamtaro movies, performing the theme songs under the name Mini-Hamus (ミニハムず).
The group later disbanded in 2004, after Todd left Hello! Project and Tsuji and Kago left Morning Musume to debut in W. In 2009, Mini-Moni was revived as Shin Mini-Moni (新ミニモニ。) with new members and remained active until 2011.