Mjällby Allmänna Idrottsförening, also known simply as Mjällby AIF, Mjällby or MAIF, is a Swedish professional football club based in Hällevik. The club is affiliated to Blekinge Fotbollförbund and play its home games at Strandvallen. The club colors are yellow and black. Formed on 1 April 1939, the club have played eight seasons in Sweden's highest football league Allsvenskan, the club's first season in the league was in 1980. The club are currently playing in Allsvenskan (top division). With nine seasons in the top division Allsvenskan, Mjällby AIF is the most successful football team from the province of Blekinge.