This research aims to test several antecedents as trust, risk, credibility, internet use, and those impact on intention for online transactions via e-commerce mobile platform and Technology Acceptance Model. The research integrated the Technology Acceptance Model (TAM) with four main constructs, namely internet use, trust, credibility, and risk, which is very important to predict individual acceptance of online transactions. Research methods were using structural equation model analysis (SEM), path analysis, and confirmatory factor analysis (CFA) of AMOS 24.0 to examine all the hypotheses, reliability, and validity for each indicator or measuring instrument. The research findings show that credibility and trust played an important role in online transaction acceptance in the e-commerce industry. Furthermore, the findings consistently supported previous studies of TAM where perceived ease of use and perceived usefulness played a role in both directly and indirectly on repurchase intention of mobile e-commerce platform. This study implied that e-commerce players must pay attention to simplifying the customer journey. Another implication was to communicate the credibility and trust aspects to the consumers. Thus the customers could understand and could be convinced that mobile e-commerce platforms are credible shopping market.