Abstract: Hunger is assigned as a kind of deliberate starvation in and in condition of fitting to states and conditions of mystic; it has on increasing effect on his body and soul. For achieve meaning to high mystical dignity, severe and continued effort is necessary that in the mind of mystics, hunger is from the main elements of jihad and struggle to carnal soul and also abstinence but the hunger should not be mandatory or compulsory and it is completely optional and the seeker must fight against the demands of carnal soul and he must avoid from eating various and delicious foods that are desirable for carnal soul. From the advantages and properties of hunger is that it causes purity of heart and sympathy and makes heart ready for endurance of a thought that achieves to knowledge and a concrete light appears to him and it is narrated from holy prophet that: “someone who keeps himself hungry, his thought and idea become great”. “Hunger” has always been considered as one of icons on the ethnics of asceticism and mysticism and all great men of Sufism agree on the necessity of “hunger” as one of the fundamental elements of conduct. In semantics of “Hunger”, a group translated it as “eating enough” and some other defined it as “fasting” and another group defined it as “not eating except in the time of necessity”. The present study endeavors to examine semantics of hunger and several viewpoints in this relation by relying on Qur’an and narratives and comparing these viewpoints specifies the meaning of hunger, virtue, wisdom and their benefits and Limitations.