Antonis Diamantidis (b. 1892, İstanbul – d. 1945) was a Greek Rebetiko singer/musician/composer. He started playing oud when he was 16, and worked as a professional singer in İstanbul from 1917 until 1922. In 1922 he relocated in Greece, where from 1923 until 1930 he collaborated with many "Smyrna-style" Rebetiko ensembles as a singer and oud player.