Arthur Henrique Ramos de Oliveira Melo (Brazilian Portuguese: [ˈaʁtuʁ ẽˈʁiki ˈʁɐmuʒ dʒi oliˈvejɾɐ ˈmelu]; born 12 August 1996), known as Arthur Melo or simply Arthur, is a Brazilian professional footballer who plays as a midfielder for Premier League club Liverpool, on loan from Serie A club 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. On 1 September 2022, Arthur joined Liverpool on a one-year loan.

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.