The purpose of this study is to discuss the legal problems on minor idor stars entertainer exclusive management contract. The problem of minors entertainer mangement contract which has been criticized as so-called “slave contract” is on noticeable unfair of the content. The content is summarized into excessive extend of the period of contract, distortion of income share structure, a severe liquidate damage and penal sum. Legal basis which causes these contracts void was §103 in existing dispute between an entertainment and an idol star. However, prior to judge legal force about individual issue, I think that it is appropriate to judge whether that contract will valid or invalid depending on whether accepting them laborer or not. Today, because of correct order of Fair Trade Commission(FTC) and an entertainment’s effort to reform to itself, fairness of exclusive contract is being recovered rapidly. With this, innovation of entertainment industries structure should be attended.