In business competition, the brand becomes a very important part for the company to differentiate from another. Brand is a very valuable business asset for the company. Having a brand with a good reputation makes the company 'more competitive. The purpose of this study was to determine the appropriate protection of well-known brands of constitution No. 15 of 2001, by viewed Pierre Cardin's case against Alexander Satriyo Wibowo. This study used qualitative normative method, by examining existing laws, collecting data library research methods, and using of primary and secondary materials. The results showed that in constitution No. 15 of 2000 about brand, definition of famous brand was not mention clearly. This can make different interpretations of well-known brands, such as the Pierre Cardin brand against Alexander Satriyo Wibowo case, there was a dissenting opinion by one of the justices. In addition, constitution about brand still need executive rule in the form of government regulation, as mandated by Article 16 paragraph 2 but until now there has been no. Therefore, Government Regulations is made as implementing Trademark Law to provide legal certainty, given the well-known brand, considering that disputing often occurs because there are differences in perception about famous brand. Keywords: Brand, Famous Brand, Famous brand protection, brand Dispute.