The main purpose of this study was to examine the effect of employees’ performance appraisal on their job satisfaction with the Moderator of Personality traits: in selected Departments of Bahir Dar City Administration. During conducting this study the researcher applied Descriptive and explanatory research designs, as well as a quantitative research approach, was applied. The population of the study consisted of employees of selected departments in Bahir Dar City Administration working in Bahir Dar. The appropriate sample has been drawn by applying stratified random sampling. The primary (from the respondent) and secondary data (from the report of the Bahir Dar City Administration Office thus, internet, and other documented materials) sources were used for this research. A selfadministered questionnaire was designed to collect relevant information from the selected 168 respondents. Among these 152 questionnaires were returned and analyzed using Statistical Package of Social Science (SPSS) SPSS version 23 and a process micro written by Dr. Andrew F... The percentage, mean and standard deviation of descriptive analysis were employed. The inferential analysis including Pearson correlation and multiple linear regressions was also employed. The study indicated that analysis of the states of employee performance appraisal in selected Departments of Bahir Dar City Administration was practiced was done using means and standard deviations at moderate extent which means practice it or it’s applied neutrally and moderate extent. In addition, the research found that four BIG FIVE Personality Traits variables have a significant and positive relationship bet ween perf ormance apprai sal and job satisfaction. Openness to experiences, conscientiousness, extroversion, and agreeableness are the four moderate factors. Neuroticism was found to be insignificant relationship b/n performance appraisal and job satisfaction. Furthermore, the study discovered that, in terms of the predicting power of independent variables, the employee's performance appraisal method had to predict the power of Administration office job satisfaction.