Flávio Beck Júnior (born 14 March 1987) is a Brazilian professional soccer player who plays as a midfielder for Liga 1 club PSIS Semarang.
After playing in Brazil during his youth career, he came to Croatia in 2006 starting his senior career at a lower league Solin. After a short spell with German side FC Energie Cottbus he signed with Albanian Superliga side KS Flamurtari Vlorë. In the second half of the 2008–09 season, he played with Široki Brijeg in the Bosnian Premier League. Afterwards, he had another spell with Flamurtari before joining Maribor in the Slovenian PrvaLiga. During the season 2010–11, he played with Bargh Shiraz F.C. in the Azadegan League, Iranian second level, before returning to Europe in summer 2011 to sign with Montenegrin top league side Bodućnost Podgorica.
In June 2013, Beck signed for Azerbaijan Premier League side Inter Baku. After only four league games for the club, Beck was told he could leave the club in December 2013. However Beck was still being left in the reserves come April after a disagreement between the club’s manager, Kakhaber Tskhadadze, and Beck’s agent. At the end of July 2014, Beck re-signed for Bodućnost Podgorica. In early September 2015, he signed with another Montenegrin top-flight club, FK Lovćen.
On 15 January 2019, Beck signed a one-year contract with Malaysia Premier League side Kelantan.