Oratorio choir of St. Mark was founded in 1920 and it is still active today. Many of conductors of this choir were quite famous at their time. From the August 1926 until August 1927, and then later, from 1930 until 1937 the choir conductor was Mladen Pozajic. In this period the choir preformed tunes of some the old masters, as well as melodies of the contemporary composers, which varied in style, and some of them were premieres written just for this choir. Contemporary critics followed the work of the choir, and among them one can easily notice some that wrote about certain notable performances, as for example the performance of Liszt's Christus. Therefore, author analyzes work and activities of this oratorio choir during the conducting of Mladen Pozajic, as it was seen by the contemporary critics. KEY WORDS: Oratorio choir of St. Mark, Zagreb, Mladen Pozajic, church singing, history of music Autorice u radu prikazuju odsjecak iz povijesti Oratorijskog zbora sv. Marka u vrijeme kada ga je kao dirigent vodio Mladen Pozajic (1930.-1937.). U njegovo doba podignuti su standardi crkvenog pjevanja i dostignuta je razina koncertnog muziciranja. O dosezima djelovanja Zbora autorice pisu na osnovi onodobne glazbene kritike u tisku. KLJUCNE RIJECI: Oratorijski zbor sv. Marka, Zagreb, Mladen Pozajic, crkveno pjevanje, povijest glazbe.