Experimental research was performed to develop an effective process for manufacturing monodispersed spherical zinc oxide fine particles by homogeneous precipitation. As the R value(molar ratio of HMTA to zinc nitrate), initial pH of the precipitating solutions and precipitation time decrease, the zinc oxide particles produced have a narrower particle size distribution. Short precipitation times lead to low yields of zinc oxide, however, yields could be increased significantly, without serious change in particle shape or size distribution, by introducing ethanol into the precipitation solutions.