| Mitchell, Leon | Leon Mitchell | Director | 2020 | 1 | |
| Marie, Élisabeth | Élisabeth Marie | Director | 1991 | 1 | |
| Marin, François | François Marin (Francois Marin) | Director | 2018 | 3 | |
| Meigné, Benoît | Benoît Meigné (Meigne, Benoît) | Director | 2015 | 2 | |
| Melrose, Rob | Rob Melrose | Director | 2021 | 1 | |
| Michalik, Mariusz | Mariusz Michalik | Director | 2009 | 1 | |
| Marischka, Georg | Georg Marischka | Director | 1977 | 1 | |
| Missiroli , Mario | Mario Missiroli | Director | 1972 | 1 | |
| Medford, Don | Don Medford | Director | 1954 - 1959 | 2 | |
| More O'Ferrall, George | George More O'Ferrall | Director | 1957 | 1 | |
| Marks, Sherman | Sherman Marks | Director | 1957 | 1 | |
| Metzner, Ernö | Ernö Metzner | Director | 1933 | 1 | |
| Modestowicz, Waldemar | Waldemar Modestowicz | Director | 2006 | 1 | |
| Mandić Rigonat, Tatjana | Tatjana Mandić Rigonat | Director | 2021 | 1 | |
| Murphy, Joe | Joe Murphy | Director | 2022 | 1 | |
| Murray, Jake | Jake Murray | Director | 2022 | 10 | |
| Mario, Emilio | Emilio Mario | Director | 1896 | 1 | |
| Miralles, Carlos | Carlos Miralles | Director | 1938 | 1 | |
| Miró, Pau | Pau Miró | Director | 2015 - 2017 | 3 | |
| Marcussen, Yngve | Yngve Marcussen (Yngve Marcussen) | Director, Dramaturg | 2012 - 2015 | 6 | |
| Mädler, Kathrin | Kathrin Mädler | Director, Dramaturg | 2011 - 2016 | 4 | |
| Marholia, Roman | Roman Marholia | Director, Dramaturg | | 2 | |
| Marinelli, Alessandro | Alessandro Marinelli | Director, Dramaturg | 2022 | 2 | |
| McLaren, Robert | Robert McLaren (Robert McLaren) | Director, Lighting Designer | 2006 - 2010 | 6 | |
| Mason, Marshall W. | Marshall W. Mason | Director, Lighting Designer | 1964 - 1973 | 2 | |
| Mercado, Antonio | Antonio Mercado | Director, Lighting Designer | 2006 - 2007 | 15 | |
| Manea, Aureliu | Aureliu Manea | Director, Lighting Designer | 1968 | 2 | |
| Mehrjui, Dariush | Dariush Mehrjui (Dariush Mehrjui) | Director, Producer | 1993 - 2014 | 3 | |
| Malmberg, Benoît | Benoît Malmberg | Director, Producer | 2012 | 3 | |
| McCleery, Albert | Albert McCleery | Director, Producer | 1947 - 1952 | 3 | |
| Morley, Royston | Royston Morley | Director, Producer | 1947 - 1954 | 3 | |
| Mosarov, Vladimir | Vladimir Mosarov (Vladimir Mosarov) | Director, Sound Designer | 2001 | 2 | |
| McCready, Kelly | Kelly McCready | Director, Sound Designer | 2016 | 2 | |
| Malmgren, Oskar | Oskar Malmgren (Oskar Malmgren) | Director, Translator | 1878 - 1886 | 10 | |
| Muinzer, Louis | Louis Muinzer | Director, Translator | 1983 - 1990 | 6 | |
| Mirski, Krastjo | Krastjo Mirski | Director, Translator | 1956 | 2 | |
| Mouzenidis, Takis | Takis Mouzenidis | Director, Translator | 1945 - 1964 | 5 | |
| Martinelli, Jean-Louis | Jean-Louis Martinelli | Director, Translator | 2010 - 2012 | 6 | |
| Mellor, Aubrey | Aubrey Mellor | Director, Translator | 1984 - 1989 | 3 | |
| Milčin, Ilija | Ilija Milčin | Director, Translator | 1957 - 1976 | 2 | |
| Mesarić, Kulman | Kulman Mesarić | Director, Translator | 1948 | 2 | |
| Maier-Gehring, Christoph | Christoph Maier-Gehring (Christoph Maier-Gehring) | Dramaturg | 2001 - 2003 | 2 | |
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