The evolution of mobile network technologies and smartphones has provided mobile consumers with unprecedented access to Internet and value-added services while on the move. Privacy issues in such context become critically important because vendors may access a large volume of personal information. Although several pioneering studies have examined general privacy risks, few systematic attempts have been made to provide a theory-driven framework on the specific nature of privacy concerns among mobile consumers. To fill the gap in the literature, this article introduced a 9-item scale, which was shown to reasonably represent the dimensionality of mobile users' information privacy concerns (MUIPC), categorized as perceived surveillance, perceived intrusion, and secondary use of personal information. Through a survey study (n=310), the three-factor structure of MUIPC as revealed in exploratory factor analysis was further confirmed through confirmatory factor analysis. Further analysis revealed that the second-order model of MUIPC performed better than its first-order model.