The aim of this study is to evaluate the effectiveness of the Tolerance Tendency Enhancement Program (TTEP) which was prepared to enhance tolerance tendency and reduce bullying level of the fifth grade students. Pretest, posttest, follow up test, control and placebo group experimental design has been used in this research. This study was carried out with a sample of 42 fifth grade students (14 for experimental group, 14 for placebo group, and 14 for control group). The data used in this study was obtained through the Tolerance Tendency Scale (TTS) and Peer Bullying Scale (PBS). Wilcoxon Signed Ranks, Kruskal-Wallis H Tests were used to analyze the data. The results of the study showed that there was a significant change between post-tests of the placebo, control and experimental groups in favor of the experimental group. It can be said that the TTEP enhance tolerance tendency and reduce bullying level of the experimental group. Besides, the TTEP applied on the experimental group was understood to have permanent effects on tolerance tendency. Conclusion part of the study, some suggestions and recommendations were provided for the counseling practices and researchers in the light of findings.