This study aims to determine the implementation of the principle of good faith in online buying and selling in Regency of Sukoharjo, Province of Central Java, Indonesia and the obstacles and alternatives to solve problems regarding the implementation of the Good Faith Principle in Online Selling and Purchasing in Sukoharjo Regency. The research used an empirical approach that was descriptive, using primary data such as interviews and reviews literature obtained from various statutory provisions in accordance with what is being researched. Analysis of data using interactive analysis, namely the data collected will be analyzed through three stages, namely reducing data, presenting data and drawing conclusions. The results of the study indicated that based on observations and interviews, the implementation of good faith in online buying and selling in Sukoharjo could not run optimally. This is due to a lack of good faith in online buying and selling so that consumers are often disadvantaged, such as the mismatch of goods with the information submitted, or the goods ordered do not match the goods sent. Apart from that, legally, the handling of the case also did not work well because from the police there was no operational funds for handling the case, and the existence of Supreme Court Regulation Number 2 of 2012 sought to resolve it by deliberation or non-litigation. The obstacle in implementing the Good Faith Principle in Online Buying and Selling in Sukoharjo Regency originated from the police. Even though many reports have been submitted, due to limited operational funds, these reports are limited to being received, but not followed up. This has an impact on the Sukoharjo District Court and District Court, which have never received an abundance of cases of violations of good faith in online shopping.