Blatný descended from a musical family from Brno. From 1915-1918 he was a soldier in Galicia, in the Bukovina and Albania. After the war he terminated his studies in Prague and became a civil servant at Czech Rail in Brno. Shortly thereafter he began his theatre activity, first as Dramaturg. He tried to bring important new works native and strange artists on the stage.
Already as a young man he published poems and short prose, later the theatre was his homeland, he wrote also numerous criticisms. His first own work was Starlit Sky (Hvězdná obloha), specified in the theatre in Brno. The play Three (Tři) and the comedy followed Kokoko dák, were his most popular works. He wrote also some Expressionist stories. He died of tuberculosis.