Ateez (Korean: 에이티즈; RR: Eitijeu, stylized in all caps) is a South Korean boy band formed by KQ Entertainment. The group consists of eight members: Hongjoong, Seonghwa, Yunho, Yeosang, San, Mingi, Wooyoung and Jongho. They debuted on October 24, 2018, with the extended play (EP) Treasure EP.1: All to Zero.

As of June 2024, Ateez have released eleven EPs, two studio album and one single album in the Korean language, as well as two single albums, three EPs and two studio albums in the Japanese language. Their albums Treasure EP.Fin: All to Action, Treasure Epilogue: Action to Answer, the Fever album tetralogy, Spin Off: From the Witness, the World album trilogy and Golden Hour: Part.1 each topped the South Korean Circle Album Chart, with Zero: Fever Part.1 becoming the group's first to be certified platinum and The World EP.1: Movement becoming their first to be certified million in the country.

The group achieved their first No.1 on the Billboard 200 with their second studio album The World EP.Fin: Will and has secured multiple No.1's on the Billboard Top Albums Sales Chart. They are also the first South Korean musical act to have three different releases chart in the top 10 of the UK Official Albums Chart within a single year.

Often referred to as "Global Performance Idols" by Korean media and dubbed "4th Generation Leaders" by the Korean Ministry of Culture, Sports, and Tourism, Ateez have sold over seven million physical albums worldwide. Their accolades include Worldwide Fans' Choice at the 2019, 2020, and 2023 Mnet Asian Music Awards and bonsang awards (main prize) at the 4th Fact Music Awards and the 30th and 31st Seoul Music Awards. The group has also served as official global ambassadors for Korean culture and tourism.

In 2024, Ateez became the first K-pop boy group to perform at Coachella and also the first K-pop group to headline the Mawazine music festival in Morocco.

Their primary producer is their labelmate Eden, the leader of Eden-ary.