The purpose of this study is to identify the extent to which knowledge management is applied at the Technical College for Girls in Riyadh from the point of view of the members of the administrative body and to find the relationship between knowledge management in its four operations and performance. To address the problem of the study, the descriptive approach was used and a questionnaire was distributed to a sample of the members of the administrative staff at the Technical College for Girls in Riyadh. The questionnaire included two sections: the first is knowledge management in its four processes (knowledge generation, knowledge storage, knowledge distribution, knowledge application) Functionality. The following statistical methods were used: percentages, arithmetic averages, standard deviation, and judging the veracity of the questionnaire presented to a group of arbitrators from faculty members of Saudi universities. The results showed that the extent of the application of knowledge management is very high at the Technical College for Girls in Riyadh. There is also a statistically significant positive relation between knowledge management in its four operations and improvement of job performance. The study concluded with a number of recommendations, the most important were to keep abreast of the successive developments in " Knowledge management and its' techniques", and to link the members of the technical college for girls in Riyadh and its employees with the new ones, and enable them to harness them in enhancing the "functional performance".