Giaever Glacier () is a glacier flowing northwest between Mount Kerckhove de Denterghem and Mount Lahaye in the Belgica Mountains of Antarctica. It was discovered by the Belgian Antarctic Expedition, 1957-58, under Gaston de Gerlache, who named it for Norwegian explorer John Schjelderup Giæver, counselor for the expedition, and leader of the Norwegian-British-Swedish Antarctic Expedition, 1949-52.