Purpose - The purpose of this study is to investigate the effect of the Trans-Anatolian Natural Gas Pipeline Project (TANAP) on industrial production in Turkey. The TANAP is a project which ensures the security of the country's natural gas supply and encourages a decrease in energy prices. So, this study investigates TANAP's efforts to decrease gas prices, as well as the effects of gas prices on industrial production. Design/methodology/approach - The data include gas prices and industrial production index series. Gas prices are approached for industrial users (nonresidential) in Turkey and industrial production index series have been discussed for whole industries. The Johansen cointegration method has been used to analyze the data, spanni...