Underground storage of natural gas is one of the main techniques that have helped make gas one of the leading energy sources in the world＇s energy balance. Underground storage facilities are instrumental in ensuring seasonal and daily adjustments in consumption. With interruptible consumers, they also contribute to supply security with a quality asset because they can be mobilized rapidly and flexibly. This article presents the varied functional framework for underground natural gas storage based of the example of France and then deals with the different techniques utilized at this point in time. The situation of the world＇s underground storage facilities is given an overall presentation, with a reminder of the important orders of magnitude and mention of a number of evolutionary trends. The recent technical achievements in massive natural gas storage underground are reviewed in the conclusion of the article.