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The Indonesian Banking industry plays an important role in supporting national economic The Indonesian Banking sector plays an important role in supporting national economic development through the collection of public funds and the distribution of credit. The rapid development of digital technology has encouraged the Banking industry to continuously innovate by providing technology-based services to improve service efficiency and customer satisfaction. One of the innovations introduced by Bank Jateng is the BIMA Mobile application, which enables customers to conduct Banking transactions quickly, conveniently, and securely. This study aims to examine the effect of perceived ease of use, perceived usefulness, and security on customer satisfaction among users of the BIMA Mobile application of Bank Jateng in Semarang City. This study employed a quantitative approach using a purposive sampling technique. A total of 96 respondents were selected based on questionnaire responses. The data were analyzed using multiple linear regression analysis with the assistance of SPSS version 25. The results indicate that perceived ease of use, perceived usefulness, and security.