We can describe the personality as follows.If it‘s simply defined Personality is the comparatively permanent set of psychological attributes that tell the difference one person from another in this report we are going to discuss about what is personality and how does it affect to organization.there are many more factors to determids the personality they are Genetic determinants Physiological determinant Psychological determinant Social determinant Cultural determinant Further mbti method and the big fife model of personality method are used to describe the personality as two main principles. We describe 16 types of personalities in mbti method,but different from each other. And we discuss five main factors on the big five model personality.they are Extroversion Agreeableness Conscientiousness Emotional stability Openness to experience Further we can also identify some personality traits as follows NARCISSISM Self monitoring CORE SELF –EVALUATIONS Risk taking Machiavellianism