The purpose of this study is to measure the job characteristics of agricultural extension centers' personnel in Assiut governorate using Hackman and Oldham's Model, and to examine the model fit with the current study. The job diagnostic survey was used as the assessment tool to measure the components of the job characteristics model. Data were collected from all of the agricultural extension centers' personnel in Assiut governorate (84 personnel) by questionnaire. The job characteristics model's overall fit with the data was evaluated using common model goodness of fit measures estimated by AMOS. The results showed that dealing with others and feedback received the highest ratings; autonomy and skill variety received the lowest ratings from the core job characteristics. The moderate feelings towards the core job dimensions yielded a low motivating potential score. Knowledge of results yielded the highest rating and experienced responsibility yielded the lowest rating from the psychological states. Internal work motivation received the highest rating and growth satisfaction received the lowest rating from the personal/work outcomes. Stimulating work environment yielded the highest rating and pay satisfaction yielded the lowest rating from the moderators of the model. The various indices of overall goodness of fit for the model lent sufficient support for the results to be an acceptable representation of the job characteristics model.