The purpose of the current study was to determine the effect of a group career guidance program in developing career values of tenth grade students in Al Dakhaliya Governorate. The study was applied to a sample of (118) male and female students. They were divided randomly into two groups: experimental group and the control group, which consisted of 59 students in each. The experimental group received a group guidance program, while the control group did not undergo to a program, but instead it received educational activities in guidance classes by a guidance specialist. The study was based on the experimental approach. The researcher used Career Values Scale which consists of (88) statements dividing into three dimensions: working with others, self-expression and extrinsic rewards, after verifying the psychometric properties of the scale. The results of the study indicated that there were no statistically significant differences between the means of the experimental group and the control group in the post-test, while there were statistically significant differences between pre-test and post-test of the experimental group in favor of post-test. For the dimensions of the scale, the results of repeated measurements analysis of variance showed that there were statistically significant differences of the experimental group in the three measurements: pretest, posttest 1, posttest 2 (follow-up) in the first and second dimensions only, while there were no statistically significant differences in the third dimension. According to gender variable, the results showed no statistically significant differences of the control group, whereas there were statistically significant differences of the experimental group in favor of females. Implications for further research were discussed.