Koza Mostra is a music band formed in Greece. It consists of Elias Kozas (vocals), Alexis Archontis (drums), Stelios Siomos (guitar), Dimitris Christonis (bass guitar), Christos Kalaintzopoulos (accordion) and Tasoulis Valkanis (trumpet). The band fuses ska, punk, and rock music together with the style of Balkan folk music such as rebetiko. They are also known for performing in kilts or fustanella.
They represented Greece in the Eurovision Song Contest 2013 with Agathonas Iakovidis and the song "Alcohol Is Free", coming 6th in the final.
Their maiden album "Keep Up The Rhythm" reached triple Platinum certification from Greek music industry authority IFPI.