Mieczyslaw Szlezer was born July 26. 1955 in Krakow, Poland. He has started his musical education at age of six under the tutorship of his father  Zbigniew, renowned violinist and teacher himself. He was graduated with honors from the Academy of Music in Krakow and continued his postgraduate studies at "Indiana University School of Music" in Bloomington, Indiana (USA) with Joseph Gingold and Tadeusz Wronski. Among his teachers were also such famous violinists like Henryk Szeryng and Franco Gulli.

He is a multiple laureate of the international and national Violin competitions.

As a soloist, member of chamber ensembles and concertmaster of the orchestras "Capella Cracoviensis" (1978-87) and "The State Philharmonic Orchestra K.Szymanowski"" (1987-2000) he has given over two thousands  performances in more than  30 countries on four continents. Since 2012 he came back to active Viola performing.

He did also numerous recordings for:"PRiTV", "RAI", "Yugoton", "France Musique", "Equant", "STEBO" ,”Amadeus Records” ,”Moderato”and „OkoArt”. Between 1995 and 2005  he was a founding member of the Piano Trio „Artemus".

His teaching career started in 1978 at the Academy of Music in Krakow where he is now holding the titular professorship in Violin and the Chair of the Violin and Viola Department (since 2008). He did a guest teaching in the USA,South Korea, Germany, Denmark and Finland.

Between 1996 and 2008 he was entrusted duties, respectively the Dean of the Instrumental Faculty and the Deputy Rector in charge of the International affairs (two terms each).

The Juror of the International Violin Competitions: “Enescu” in Bucharest (Romania) ,”D.Tugemann” in Jerusalem (Israel) , “Telemann” in Poznan, Lipinski and Wieniawski in Lublin and  “Wronski” in Warsaw (Poland) and all-Poland competitions in Krakow, Sochaczew, Kutno and Trzciana.