Mirko Malez (November 5, 1924 – August 23, 1990) was a prominent Croatian palaeontologist, speleologist, geo-scientist, ecologist and natural history writer.
He was known as a "pioneer of Croatian speleoarchaeology".
He was a member of the Yugoslav Academy, JAZU (present-day Croatian, HAZU - Croatian Academy of Sciences and Arts and one of only four Croatian PhDs of speleology (Josip Poljak 1922, Mirko Malez 1963, Srecko Božicevic 1985, and Mladen Garašic 1986).
Thanks to Malez's popularization of science, Varaždin County, in northern Croatia, is also known as a "cradle of the Palaeolithic age".
In his honor four new species were named: Dalmatichthys malezi (Radovcic 1975), Ilyocypris malezi (Sokac 1978), Mimomys malezi (Rabeder 1983) and Vaccinites malezi (Sliškovic 1991).
Most of his papers and research interests were directed towards fossil mammals of the Pleistocene and the paleontological processing of certain species, determining their taxonomy, migrations and palaeogeography.