Benevolent activities, like other human activities, can be the subject of study in various sciences, including economics. This article seeks to find an appropriate answer to how the Infaq Demand function is organized. The results of the analysis of this article, which has been done using descriptive-analytical method and with the method of library and expert inquiry, show that the Demand for Infaq is composed of different vectors of characteristics. Therefore, the applicants determine the amount of their Demand according to their degree of importance. This article has tried to obtain a complete set of these trajectories and suggestions to strengthen them in the country by using Quranic documents and narration and asking experts. Then, inspired by Lancaster's Demand theory, establish the Infaq Demand function based on these characteristics and derive the Infaq valuation function by using the Hedonic price function. Identifying the Demand function of Infaq and introducing effective vectors in that path provides solutions to strengthen them in order to boost the Infaq market in the country.