Good company is not only runs for a profit, but also its efforts to make customer’s satisfied. PT. Telekomunikasi Indonesia (Tbk) is a company of Information Technology and Communication with service providers and telecommunication network in Indonesia. The purpose in writing this final report is to know the service performance that provided by Plasa Telkom Pahlawan Semarang, to know the expectation or interests of the customer’s and to know the customer’s satisfaction that done with comparing between the service performance and the customer’s expectation in Plasa Telkom Pahlawan Semarang. Sampling technique which used is accidental sampling. Total of sample consisted of 100 respondents. Data collection method which used were questionnaires and literatures. Statistical analyzes that used were validity, reliability, and suitability level respondents. It can be found that the suitability level respondents were on average 87.04, it means the function performance can fulfill or even exceed of the customer’s expectations, it can be said that customer’s satisfaction can be reached by service providing. It can be known, there are two elements or important services considered by customer’s but get a little attention from Plasa Telkom Pahlawan Semarang, so the customer’s left with discontent due to these elements, service time in the Plasa Telkom right as promised, each customer’s complaint or question, the officers listen attentively. The details of suitability level respondents were: tangibles was 85,06%, reliability was 86,27%, responsiveness was 90,11%, assurance was 84,93%, empathy was 88,85%.