The purpose of this study is to find factors that affect the continued intention to use mobile Internet services. Based upon a literature review conducted on the acceptance of mobile information technology, a research model was created; ?individual perception factors such as usefulness, enjoyment, values and anxiety, and social influence factors such as subjective norms and voluntariness determine the intention to use the mobile Internet services on a continuous basis,? and verified using an empirical method. The test result has revealed that usefulness and enjoyment in the individual perception category, and subjective norms and voluntariness in the social influence category affect the continued intention to use mobile Internet services.