Some warty patches slightly raised from the surface of the leaf sheath of some sugarcane plants in a sugarcane field at Sevanagala (6 0 36' N, 80 0 87' E), Sri Lanka, were observed during a field inspection in July 2016. These patches were irregular in shape and watery in appearance initially. Later, they become dry and reddish to dark red in colour. Microscopic examination on the damaged leaf sheaths showed large a population of minute mite. This study was conducted from July to September 2016 to identify this mite species and to investigate its damage symptoms and the occurrence in all sugarcanegrowing areas in Sri Lanka. Two hundred specimens of the mite were sent to Embrapa Recursos Geneticos e Biotenologia, Brazil, for identification. Fifty mite-infested plants from each age category, <5 months and >5 months, were inspected to study the damage symptoms and fifty randomly selected plants from each age group were inspected to record the damage incidence in the plantations in each sugarcane-growing site; Uda Walawe, Sevanagala, Pelwatte, Hingurana, Ethimale and Kantale. The specimens were identified as Sugarcane Blister Mite, Aceria sacchari Wang, 1964 (Acari: Trombidiformes: Eriophyidae). This is the first record of this mite on sugarcane in Sri Lanka. This mite has distributed in all sugarcane-growing areas in the country with different infestation levels. During the study period, the highest damage incidence on both age groups was recorded at Pelwatte while the lowest was at Hingurana.