This study explained the nature of relationship between job satisfaction and job performance of the middle level employees of Pakistan banking sector. Pakistan economy was facing economy crises last 30 years and banking sector was showing instability since 2005. This study helps the measure the job performance effectiveness by the job satisfaction so banks can improve their performance by satisfying their employees. For the measurement of the job satisfaction and job performance, two models were considering to analysis the nature of relationship between them. Demographic factors such as age, gender, salary and expenses were use to show the background of the respondents. Analysis of these factors showed that employees in early stages of careers are more satisfied then older employees and they performed also better than those employees.