This study reports the onset of stuttering after a car accident and discusses the nature of acquired stuttering. A 34 year-old man showed depression and moderate stuttering after a car accident but with no other neurological or cognitive problems. Six months later, he manifested little stuttering in his speech but with unnatural prosody. Another five months later, his speech became fluent again and was relatively natural with a certain Korean provincial accent. The case indicates that stuttering after car accidents may result from a psychological problem rather than a neurological problem.