Marcela Miriam Losardo (born 24 August 1958) is an Argentine lawyer and politician.

She served as the country's Minister of Justice and Human Rights from 10 December 2019 to 29 March 2021, in the cabinet of President Alberto Fernández.

[4][7] She left the secretariat in 2009 at the behest of Alak; her successor was Héctor Masquelet.

[9][10] On 6 December 2019 it was announced Losardo was going to be the new Minister of Justice and Human Rights in the incoming cabinet of President Alberto Fernández, succeeding Germán Garavano.

[15] Losardo is married to Fernando Mitjans, a scrivener whom she met while studying in university.