Abstract This study examines the economic impact of illegal gold mining (PETI) in Lalar Liang Village, Taliwang District, West Sumbawa Regency. Since the discovery of gold reserves in 2015, the people of Lalar Liang Village have been involved in illegal gold mining activities that are carried out traditionally and without official permission from the government. The purpose of this study is to analyze the influence of illegal gold mining on the economic welfare of mining workers and the surrounding community. The research method used is a qualitative approach with case studies, involving interviews with local communities. The results of the study show that illegal mining has a positive impact in the form of increased income, job opening, and economic progress of the community. The presence of illegal mining helps improve the welfare of the local community, with many residents earning income from the mining sector. This research suggests that governments provide sustainable long-term solutions to address people's dependence on illegal mining while maintaining their economic well-being. Key Words: Illegal Mining, Economy, Miner's Income