We have discussed about Conglomerate(namely “Chaebol”) for decades so far, and that is reiterated intensively over and over again whenever the election is near at hand. This article is trying to show the several criteria to review the legitimacy and reasonability of the articles on suppression of economic power concentration including restrictions on holding companies, prohibitions on cross-shareholding, ceiling on the total amount of shareholding, prohibition on debt guarantees for affiliated company, and limitations on the voting rights of financial or insurance companies in Monopoly Regulation and Fair Trade Act. In the first place, this article ruminates the history of appearance of the Conglomerate in Korea and economic backing of it. In the second place, this article tries to find out the fallacies and changes of norms related to the competition law through the research of the history and several amendments of those articles. In the third place, I appraise the necessity and legitimacy of those articles in the light of history of the enactment, the changes of the amendments, consistency and equity of them, coincidence of the Constitution, and the global standards on them. This article will be helpful for the future legislation scheme to clarify whether the articles mentioned-above are subject to be indispensible under the Act.