The research was developed with main objective of verifying the effect of perceived transaction speed, performance expectancy and social influence on behavioral intention towards mobile payment services of Cambodian users. A research model was developed in which behavioral intention of mobile payment users was influenced directly by perceived transaction speed, performance expectancy and social influence. The effects of perceived transaction speed on performance expectancy and social influence were analyzed in the research. A successful 210 questionnaires were collected from real mobile payment users in Cambodia. It was identified that behavioral intention was significantly and positively influenced by perceived transaction speed, performance expectancy and social influence. However, the effects of perceived transaction speed on performance expectancy and social influence were not statistically significant. Based on these findings, some recommendations to government, commercial banks and private mobile payment providers in Cambodia were proposed.