The concept of right is intrinsic part of human life by birth. When a right is recognized by any authority then it becomes applicable for all. This paper discussed the basic concept, evolution and classification of right. In classical Buddhism there is not such specific discussion on human right but their conception of Dharma determines what is right in any situation from all prospective and in all contacts. Basically, in Buddhism the concept of morality implies right. According to Buddhism all human being as equal in dignity and rights irrespective of caste, race, colour and gender. After analytical study of the concept of right for nun we can conclude that, in spite of all equality in Buddhism there is some discriminations with nuns in ‘Garudhamma’ which describes some rules for nuns in Vinaya Pitaka.