The public sector is under increasing pressure to demonstrate that their services are customerfocusedrnand that continuous performance improvement is being delivered. The aim of thisrnresearch was to assess the effect of service quality on customer satisfaction in case of ministry ofrntrade. The researcher was used information from the respondents. A total 176 sample were usedrnto collect date.The primary data was collected using open and closed questionnaire forrncustomers and interview for managers of ministry of trade. To substantiate the primary data thernresearcher used secondary data from published and unpublished bulletin, annual reports,rnliteratures, observed and ministry of trade web site. After collecting the data the researcher wasrnused quantitative and qualitative data analysis method. Quantitative data were analyzed usingrndescriptive andlinear regression statistics with the help of SPSS 20.0 version software, table,rnPercentages, reliability test and problem score analysis were used in analyzing the collectedrndata. From the analysis major findings reveal that quality of service does strongly effect therncustomer satisfaction and it was found out that the overall service quality perceived by therncustomers was not satisfactory, that expectations were higher than perceptions. Customers werernnot satisfied with service. The results and findings showed that the ministry of trade lacksrninformation concerning customersâ€™ needs, wants, expectation and their satisfaction. Therefore,rnabove customersâ€™ expectationby assessing all the service quality dimensions regularly and timelyrnamending the rule and regulation, improve procedures, and hiring competent employees so on. Itrnwill also contribute to research since this study sets the ground for further research in measuringrnservice quality in other branches and in the service sector.