Arthur Henrique Ramos de Oliveira Melo (born 12 August 1996), known as Arthur Melo or simply Arthur, is a Brazilian professional footballer who plays as a midfielder for Serie A club Fiorentina, on loan from Juventus.

Born in Goiânia, Arthur began his career with Grêmio, and won the Copa Libertadores in 2017. He signed for Barcelona for an initial fee of €31 million in 2018. Arthur joined Italian club Juventus in 2020. He joined Liverpool for 2022-2023 season on a loan deal but he only made one appearance for the first team, coming on as a substitute in the 77th minute away to Napoli in the Champions League.

Arthur made his senior debut for Brazil in 2018 after previously being capped by Brazil youth team at under-17 level. He was later part of the squad that won the 2019 Copa América.