Abstract: A discussion on temperament is found in the writing of Hippocrates under such a heading as Constitution, diathesis Catastasis, etc. Galen has while discussing it at a length given a new dimension to it. The Arab medical authors worked on the theory of temperament most assiduously and finally established it as a principle or norm of treatment. With their penetration they succeeded in locating the relationship between disease, various humors and disturbance of temperament. Although concept of temperament is Several Centuries old, it has endured. Recent Studies have brought this Concept of Temperament once again to the forefront of medical research. Everything in this world animate of inanimate have been attributed a temperament as a result of interaction between qualities (kafiyat) of their Constitution. Ahmad in the view of Ibn–e-sina he quotes Allah most beneficent has furnished every one and each of its member with a Temperament which is entirely the most appropriate and best adopted for the performance of its functions and passive State.