| Mack, Duncan | Duncan Mack | Director | 2002 | 1 | |
| Magelli, Paolo | Paolo Magelli | Director | 1999 | 1 | |
| Magill, Simon | Simon Magill | Director | 2000 | 1 | |
| Makai, Péter | Péter Makai | Director | 1961 | 1 | |
| Marchant, Jules-Henri | Jules-Henri Marchant | Director | 2002 | 1 | |
| Marcks, Albrecht | Albrecht Marcks | Director | 1876 - 1890 | 5 | |
| Marton, László | László Marton | Director | 2001 - 2005 | 5 | 1 |
| Mbugua, Ian | Ian Mbugua | Director | 2006 | 1 | |
| McAllister, Peter | Peter McAllister | Director | 2004 | 5 | |
| McDonald-Lewis, Mary | Mary McDonald-Lewis | Director | 2007 | 1 | 1 |
| McNamara, Cienda | Cienda McNamara | Director | 2008 | 1 | |
| McSweeney, Kevin | Kevin McSweeney | Director | 2001 | 2 | |
| Melldahl, Åsa | Åsa Melldahl | Director | 2000 - 2007 | 3 | 1 |
| Meltke, Martin | Martin Meltke | Director | 1981 | 1 | |
| Mentzel, Horst | Horst Mentzel | Director | 1975 | 1 | |
| Mercure, Jean | Jean Mercure | Director | 1952 | 1 | |
| Metcalfe, Edgar | Edgar Metcalfe | Director | 1970 | 3 | |
| Michaels, Stephen | Stephen Michaels | Director | 1991 | 1 | |
| Militaru, Sorin | Sorin Militaru | Director | 2006 | 2 | 1 |
| Mills, Liz | Liz Mills | Director | 1995 | 1 | 1 |
| Molitorisz, Manfred | Manfred Molitorisz | Director | 1980 | 1 | |
| Montgomery, Gary | Gary Montgomery | Director | 1974 | 1 | |
| Morelli, Richard | Richard Morelli | Director | 1949 - 1959 | 3 | |
| Moszkowicz, Imo | Imo Moszkowicz | Director | 1964 - 1965 | 4 | |
| Musgrove, Katherine | Katherine Musgrove | Director | 2004 | 1 | |
| Maoysz, Mieczysoaw | Mieczysoaw Maoysz | Director | 1970 | 1 | |
| Müller, W. | W. Müller | Director | 1998 | 1 | |
| Miller, Henry | Henry Miller | Director | 1906 - 1907 | 5 | 1 |
| Macedonio, Francesco | Francesco Macedonio | Director | 1974 | 2 | |
| Min, Zhang | Zhang Min | Director | 1935 | 2 | |
| Merő, Béla | Béla Merő | Director | 2005 - 2010 | 2 | 1 |
| Mellies, Eberhard | Eberhard Mellies | Director | 1956 - 1958 | 2 | |
| Moyo, Gankhanani | Gankhanani Moyo | Director | 2010 | 1 | |
| Maher, Chris | Chris Maher | Director | 2011 | 1 | |
| McGregor, Ross | Ross McGregor | Director | 2010 | 15 | |
| Meery, Hans | Hans Meery | Director | 1889 - 1914 | 33 | 1 |
| Munkwitz, Adolf | Adolf Munkwitz | Director | 1911 | 1 | |
| Meyer-Bruhns, Adolf | Adolf Meyer-Bruhns | Director | 1937 - 1938 | 2 | |
| Meltzer, Charles Henry | Charles Henry Meltzer | Director | 1900 | 1 | |
| Mandrovitsch, Adam | Adam Mandrovitsch | Director | 1901 | 1 | |
| Martyn, Edward | Edward Martyn | Director | 1903 - 1904 | 2 | 1 |
| Moore, George | George Moore | Director | 1903 - 1904 | 2 | 1 |
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