Introduction: Personnel’s concept of hospital is formed organizational climate and the most common internal factor at hospital that affects organizational climate is personality characteristics of personnel. These characteristics effect on humanistic communications. The aim of this study was to determine the relationship between hospital personnel’s personality characteristics and organizational climate. 

Methods: This is a descriptive-correlation research. The statistical sample consisted of 120 personnel of Fateme-ye Zahra hospital in Najafabad were selected from all personnel through the convenience sampling in 2008. The Eysenck Personality Questionnaire, covering personality aspects (introversion, extroversion, emotional stability and neuroticism) and organizational climate questionnaire in its six aspects (supportive, directive, restrictive, collegial, committed, and disengaged) were used for data gathering. Data were analyzed by descriptive statistics, chi-square test and t-test.

Results: There is no relationship between the personality characteristics of personnel and open/closed organizational climates. Also, no relationship was found between personality aspects and organizational climate except of disengaged. We found a positive relation among four aspects of personality. 

Conclusion: Extrovert personnel need to possess more committed of organizational climate. Thus, the hospital managers need more cognition about personality characteristics to select them in a better way.