The present application addresses the problem of providing a novel salty taste-enhancing agent and a manufacturing method therefor, as well as a method for enhancing the salty taste of a food or drink. As a means for solving said problem, a salty taste-enhancing agent obtained from a compound represented by general formula (1) or a salt thereof is provided. [Chem 1] (1) [In the formula, R is as defined in the Specification.]