Poppin'Party is a Japanese pop-rock band that serves as the flagship act of Bushiroad's multimedia franchise BanG Dream!. The group exists both as a fictional band within the franchise's anime and game narratives and as a real-life performing unit where its voice actors play their own instruments on stage. The band was formed in early 2015 and released its first single, Yes! BanG_Dream!, in February 2016.

The group is composed of five members, each corresponding to a character in the BanG Dream! series. The lineup includes Aimi on vocals and rhythm guitar, Sae Otsuka on lead guitar, Rimi Nishimoto on bass, Ayasa Itō on keyboards, and Ayaka Ōhashi on drums. The group's name is often shortened to Popipa by fans. Poppin'Party's music is released under the Bushiroad Music label and has been produced by composers including Junpei Fujita and Noriyasu Agematsu of Elements Garden.

Poppin'Party has an extensive discography closely tied to the BanG Dream! franchise, but the group has also provided music for other anime series. The band performed Saa Ikō!, the opening theme song for the 2018 anime series Future Card Buddyfight Ace. This song was highlighted in a promotional video for the show ahead of its premiere on TV Aichi and TV Tokyo in June of that year.

The band's music is central to the BanG Dream! anime adaptations. They performed Tokimeki Experience! as the opening theme and Kira Kira da toka Yume da toka ~Sing Girls~ as the ending theme for the first season of BanG Dream!. Their song Jumpin' was used as an ending theme for BanG Dream! 2nd Season. Other notable singles from the group include STAR BEAT! ~Hoshinokodou~, Time Lapse, and Initial/Yume o Uchinuku Shunkan ni!, the latter of which reached number one on the Oricon weekly singles chart in January 2020.

Musically, Poppin'Party is characterized by an energetic and accessible pop-rock sound that often incorporates elements of punk and alternative rock. The band's lyrics typically focus on themes of friendship, pursuing dreams, and the joy of musical expression. In addition to original music, Poppin'Party has also released cover versions of popular songs, such as their 2024 rendition of Kaibutsu no Hana.

Poppin'Party holds significant industry importance as a pioneering force in the modern wave of seiyuu bands, where voice actors perform live concerts as their characters. The group has achieved notable commercial success, with multiple singles and albums charting in the top ten of Oricon's rankings and selling out major venues like the Nippon Budokan. Their success helped establish BanG Dream! as a major multi-platform franchise, spawning numerous other successful bands within the same universe, such as Roselia and Raise A Suilen.