The purpose of this study is to determine the effect of music therapy to patients with addictive disorders by performing meta-analysis on the result of related researches published by 2017 in domestic. After computing 139 effect size cases out of 28 researches, total mean effect size turns out to be big size effect as 0.839, which shows music therapy is highly efficient to patients with addictive disorders. The mean effect size results for each object group are as follows. In age, Adult is the most effective group, and followed by childhood/adolescent. In gender, female is the most effective group, followed by male, and coed group in order. In symptom, internet game is the most effective group, followed by alcohol, internet, smoking, smart phone in order. According to interventional methods, combined method shows the greater number of effect size. positive method also shows big level effect size. For each interventional characteristic, a total of eight to twelve sessions, the result turns out to be the biggest effect size with more than sixty minutes per session. According to the major of researcher, Music Therapy major is slightly bigger compare to other major ones. Lastly, for interventional purpose, cognitive category shows the biggest effect size. Also, emotional and behavioral category show the bigger effect size overall. As a result, this study proves to the purpose that music therapy is effecting significant intervention for patients with addictive disorders.