Martin Christensen Braithwaite (/ˈbræθweɪt/;[3] born 5 June 1991) is a Danish professional footballer who plays for Campeonato Brasileiro Série A club Grêmio and the Denmark national team.

Having begun his career at Esbjerg fB, he went on to play for Toulouse and Bordeaux in Ligue 1, and Leganés and Barcelona of La Liga.

Braithwaite started out in the academy at Sædding-Guldager Idrætsforening (SGI), after which he joined the biggest club in his city, Esbjerg fB.

He then spent a short time at FC Midtjylland's sports academy, before moving back to Esbjerg, signing a three-year youth contract in 2007.

At the same time he was being rumoured to be attracting the interest of a number of European clubs including Auxerre, Rennes, Celtic and Hull City.

[13][14] On 13 July 2017, Braithwaite signed a four-year contract with EFL Championship club Middlesbrough for an undisclosed fee, reported to be around £9 million.

[23] After his unsuccessful attempt to leave the club in the 2018 summer transfer window, Braithwaite played the first half of the season for Middlesbrough, scoring three goals in 18 appearances.

[citation needed] Braithwaite joined La Liga side CD Leganés at the beginning of the 2019 January transfer window on a loan deal until the end of season.

[24] He made his league debut for the club on 12 January, in a 1–0 victory against SD Huesca, coming on as a substitute for Guido Carrillo for the last 26 minutes, and scored his first goal four days later in a 1–0 Copa del Rey home win against Real Madrid.

On 24 July, he agreed to a permanent four-year deal with the Pepineros for a rumoured fee of €5 million, hence becoming the second most expensive player in the club's history.

[35] On 15 August 2021, Braithwaite scored a brace and assisted teammate Sergi Roberto's goal in Barcelona's opening-day match of the 2021–22 season; a 4–2 home win against Real Sociedad.

He declined the offer[50] and went on to make his senior debut for the Danish national team in June 2013 in a friendly against Georgia, starting the game and playing the first half.

[56] Braithwaite has a Guyanese father[57] and his younger sister Mathilde (born 2002) plays football for KoldingQ and for Hofstra University women's soccer team.

[59] Braithwaite is the nephew and business partner of the Danish-born, American-based, real estate developer Gareth Roger James Smith.