The study was designed to examine the effects of the spirituality improvement group counseling on spirituality, self-esteem and psychological well-being of Sunday school teachers. In the stage of treatment and evaluation, to verify the effectiveness the sunday school teachers at L Catholic church in Busan divided into two groups; 8 in an experimental group, 8 in a controlled group. The program has been conducted to the experimental group for 100minutes in one week two time(total 9times). Both groups took a post-test after the program by utilizing the same inventory. Mean and standard deviation was obtained by using SPSS/WIN 12.0 and ANCOVA was utilized to make statistical analysis of the effectiveness of the program. The findings of the study were as follows: First, the experimental group that participated in the spirituality improvement train program showed more significant improvement in spirituality than the control group. Second, the experimental group didn't show significant improvement in self-esteem than the control group. Finally, the experimental group showed more significant improvement in psychological well-being than the control group. On the basis of the study results above, the spirituality improvement train program are very effective to improve spirituality, self-esteem and psychological well-being of Sunday school teachers.