Martin Fritz Glaessner AM (25 December 1906 – 23 November 1989) was a geologist and palaeontologist. Born and educated in Austro-Hungarian Empire, he spent the majority of his life in working for oil companies in Russia, and studying the geology of the South Pacific in Australia. Glaessner also did early work on the classification of the pre-Cambrian lifeforms now known as the Ediacaran biota, which he proposed were the early antecedents of modern lifeforms.