One of the financial vitalities is Zakat-e-fetreh, which would become vital when the religious conditions of the guardian of the family reach the limit. Religious reasons have confirmed its payment and all of the Muslims try hard to do so. The management of this financial vitality depends on the knowledge on the amount. This paper endeavors to note its religious subjects, meanwhile according to every tenth of the population that are below financial poverty, calculating the country's money of zakat-e-fetreh for both the rural and the urban society at the national and family level for the period of 1370-85, and ultimately, according to the results of the poverty gap, comparing between the amounts of zakat-e-fetreh and the poverty gap of the national level. The results indicate that in the above time period, the amount of this zakat-e-fetreh in order to eliminate the lack of food, has not been enough and other devices like finance zakat, khoms, or other payments should be used.