Modern markets and traditional markets are economic institutions where buyers and sellers meet. The existence of a modern market (Supermarket) has its own consumer appeal compared to traditional markets. In supermarkets, we often see prices set in modern markets in the form of prices with odd rupiah values. The purpose of this study is to find out the regulation regarding rounding prices for odd goods in supermarkets and the implementation of Article 6 of the Minister of Trade Regulation Number 35 of 2013 and to find out the legal consequences for business actors who violate price rounding which can harm consumers in terms of Law Number 8 1999 concerning Consumer Protection. This study uses a normative juridical approach, namely research that refers to the legal norms contained in the legislation which is carried out by examining library materials or secondary data. Secondary data consists of primary legal materials used here, namely Law Number 8 of 1999 concerning Consumer Protection, Secondary Data and Tertiary Data. According to article 6 of the Regulation of the Minister of Trade Number 35 of 2013 in the event that the price of goods and/or tariffs for services contains a nominal fraction of Rupiah that is not circulating, business actors may round off the price of goods and/or tariffs for services by taking into account the nominal rupiah in circulation. With the cases that often occur in buying and selling transactions at supermarkets, an agreement is required between the cashier in this case as a business actor and the consumer to inform the rounding of the price of the item, so that no party feels disadvantaged. The legal protection regulated in Indonesia is based on Law Number 8 of 1999 concerning Consumer Protection. It is hoped that retail entrepreneurs or modern markets can set the price of a product in accordance with the current rupiah denomination. So that the price certainty given to consumers can be guaranteed, and no consumers feel aggrieved by the odd price determination. It is hoped that the government, especially the Ministry of Trade, can provide regulations and disseminate information to entrepreneurs or producers regarding setting the price of a product in accordance with the value of the rupiah at At the moment.