This study aims to analyze legal problems in online buying and selling (e-commerce) in terms of laws and regulations. The research method used is normative juridical. The results showed that the application of online buying and selling in practice raises several legal problems, including the following: 1) Consumers cannot immediately identify, see, or touch the goods to be ordered; 2) Unclear information regarding the products offered and/or there is no certainty whether consumers have obtained various information that is worthy of being known, or that is necessary to make decisions in a transaction; 3) Unclear status of the legal subject of business actors; 4) There is no guarantee of transaction security and privacy and an explanation of the risks associated with the system used; 5) The imposition of unbalanced risk, because generally for buying and selling on the internet, payments have been made in full first by consumers, while the goods are not necessarily received or will follow later, becaus  the existing guarantee is a guarantee of delivery of goods not receipt of goods; 6) it is difficult to know clearly when an agreement between the two parties will occur; 7) There is no guarantee institution for the validity of the online shop; 8) Transaction security issues related to legal certainty guarantees