In recent years, banks have begun to realize the importance of Internet banking services and their connection with the banking sector. The main purpose of this article was to find the mediating role of employee innovativeness in the relationship between Internet banking and employee performance of certain banks in the Republic of Congo. A 350-sample size was considered, and a partial least square and structural model equation was used for data analysis. The research results suggested that Internet banking positively affects employee performance and employee innovativeness. They also confirmed that employee innovativeness partially mediates the relationship between Internet banking and employee performance. The theoretical model was built based on Diffusion of Innovation (DOI) Theory, Job Demands-Resources (JD-R) Model, Absorptive Capacity Theory (ACT), and Resource-Based View Theory. This work makes a more accurate contribution to the literature on Internet banking and employee performance. The study further provided recommendations and suggests directions for future studies.