Abstract: Obesity is considered as one of the most serious public health challenges of the early 21st century.recent studies including doctors, nurses and psychologists, demonstrated that health care professionals had common social biases regarding obese individuals So, the present research aimed Attitudes and beliefs of nurses about excessive body weight and obesity. This study, was a Descriptive-cross-sectional survey conducted from July 2014 to October 2014. Eighty nurses in the service of Kermanshah University of Medical University, responded to the survey.The survey tool was a self- reported questionnaire. Two questionnaire used for data collection were adopted as a research tool by the Yale in 2013 University’s Rudd Center for Food Policy. Respondents were allowed 1 hour to complete the questionnaires anonymously without interruption at their hospital workplace data was analyzed using descriptive statistics, chi-square test and t-test analysis by SPSS-11 software. This study, did not identify any significant difference based on age, gender, and work experience of respondents and their attitudes toward and beliefs about obese people. Analysis did not identify any significant differences in attitudes or beliefs about obese people and the age of the nurses. however, There was an identified, significant difference in positive attitude towards and beliefs about obese people by over-weight than underweight or normal weight nurses. Attitudes and beliefs need to be assessed, brought up and discussed in the work groups. Managers and primary care personnel need to jointly discuss measures to initiate and improve prevention and management of obesity, including organizational factors that might facilitate such improvements.