We examined the effectiveness of a bibliotherapy program and anger control program on reducing children's aggression. Forty-four elementary school students from low-income families participated in this study. Fifth and sixth graders received bibliotherapy, anger-control training, or no treatment. Compared to the control, bibliotherapy and anger-control training were equally effective in reducing indirect aggression, assault, and total aggression. However, bibliotherapy lowered negativism and verbal aggression than anger-control training. No between-group difference was found on irritability. Possible explanations of these findings were discussed and several suggestions were made for future research and program developments.