This study aimed at exploring the level of Diagnostic Tests' Preparation Skills among the teachers of the first Three Elementary Grades at the Directorate of Education of Bani Kinana District, and its relationship to the variables of gender, academic qualification, and years of experience. The sample of the study consisted of (264) male and female teachers. In order to achieve the aims of the study, data were collected through a questionnaire that was developed for measuring the level of attitudes towards the preparation of diagnostic tests. Validity and reliability of the scale were tested. Statistical analyses applied included means, standard deviations, 3-way ANOVA. Results showed a medium degree of the presence of a moderate level of diagnostic tests' preparation skills among the teachers of the first elementary grades in the Directorate of education in Bani Kenanah district, with a mean of (3.56). Results showed also lack of statistically significant differences at the significance level of (a=0.05), in the level of diagnostic tests' preparation skills among the teachers of the first three elementary grades in the directorate of education in Bani Kenanah District, due to the variables of gender and number of years of experience. Results showed statistically significant differences, at the significance level of (a=0.05) in the diagnostic tests' preparation skills among the teachers of the first elementary grades in the Directorate of education in Bani Kenanah district, due to the variable academic qualification. The difference was between (high diploma) and (M.A. degree or Higher), and on behalf of the (M.A. degree or more).