Scanning electron microscopy studies were conducted to examine and characterize the erosion damage of epoxy resin. Erosion was caused by cavitation in a rotating disk device with water as test liquid. Erosion volume rate vs. time curves exhibited deceleration and steady state periods only. Erosion pits also initiated secondary erosion downstream of the eroded pits. The brittle-type fracture was evident from all scanning electron micrographs examined so far. This was demonstrated mainly by the formation of sharp boundaries and cracks in the localized zones of impact. The most unusual type of fracture modes were (a) layered fracture, (b) channel-like fracture, (c) root-type fracture and (d) microlayer fracture or delamination. The shapes of debris were spherical, needle type and irregular angular.