The quality of services provided by the government sector increasingly important in developing countries, especially in sectors that monopoly government service delivery, such as the case of the Atomic Energy Authority, Egypt, which imposes on exporters buy their services, despite the lack of satisfaction with the its functional quality, and here comes the importance of this applied research one such the government agencies to analyze the functional service quality its relationship with marketing performance, scale of SERVQUAL was used to measure service quality and Marketing Balance Score Card to measure marketing performance, the research result show a significance relationship between service quality and marketing performance.