The purpose of this study is to develop a cognitive-behavioral therapy(CBT) program for ADHD-prone children with depressive problem and to evaluate its effects. ADHD symptoms leads to several secondary difficulty. Current treatments for ADHD have focused on ADHD children with externalizing problems. However many ADHD children have depression, anxiety and other internalizing problems. Therefore, it is very important to develop a new treatment for their internalizing problems, low self-esteem and self-efficacy. The CBT program was developed and used to decrease ADHD symptoms, a level of depression and improve a level of self-esteem and self-efficacy. It is used to help children to adapt themselves into their family, schools and other various environments. For the subject of this study, 23 children who are qualified for Korea ADHD Rating Scale were selected. The treatment group(n=9) were treated with a CBT program while the attention placebo control group(n=6) had various art activities and the no-treatment control group(n=8) did not receive any treatment at all. Total twelve terms of the CBT program and the art activities were carried out three times a week and each term took an hour. The findings from this study are summarized as follows: First, ADHD symptoms of children in the treatment group has decreased, compared to the attention placebo and no-treatment control groups. Second, the level of depression in the treatment group has decreased, compared to the attention placebo and no-treatment control groups. Third, self-esteem and self-efficacy have increased in the treatment group but not in the two control groups. The study reveals that the CBT program is effective for the ADHD-prone children with depressive problem.