This study aims to examine the effectiveness of behavior modification through token economy techniques in increasing responsible behavior in early childhood. This type of research is a quantitative single-case experimental design. The subject in the study is one early childhood children aged 5 years. Data collection techniques used are observation, interviews, and documentation. The validity test in this study uses the validity of expert judgment. Data analysis uses a visual analysis approach. In this study, the A-B-A-B type withdrawal/reversal designs are used, in which the pre-test is carried out at stage A (baseline) and the post-test is carried out at stage B (intervention). The result shows that the use of the token economy technique is effective in increasing responsible behavior in early childhood. This is proved by the results from the baseline 1 (A) and baseline 2 (A) stages the score of child responsibility is from 1.25 to 1.83. This score indicates the low level of responsible behavior shown by the subject. While at the intervention stage 1 (B) and intervention 2 (B) the repeated scores are 4.83 to 5. The score indicates a high intensity of the subject in showing responsible behavior. So, it can be concluded that behavior modification through token economy is effective for increasing responsible behavior in early childhood.