The naming deficit has been defined as a problem in generating a specific word in any given situation. Children and adults with oral and/ or written language impairment s are often inaccurate when naming objects. Therefore, naming ability has been examined repeatedly in an effort to under stand normal and disordered language behaviors. The purpose of this study was to examine the development of naming ability of 80 normal Korean children aged 2, 3, 4, and 5 year s and to investigate the error types of naming. The following result s were found in the experiment : (1) The accuracy of naming increased in line with the increase of age: 12.04 % for the 2-year - olds, 26.65 % for the 3-year - olds, 45.31 % for the 4-year - olds, and 62.04 % for the 5-year - olds, (2) The number of error s for each error type (except for phonological errors) significantly decreased as children got older . The implications of the results were discussed.