Introduction:
Obesity is an advanced stage of overweight. According to “100 million health" survey, in Egypt (2019) which screened 49.7 million adult Egyptians (≥18 years old), 39.8% of adult Egyptians suffered from obesity (BMI ≥ 30 kg/m2).
Weight bias is the negative attitudes towards and beliefs about others because of their weight. Moreover, obesity stigma involves actions against people with obesity that cause marginalization and leads to inequities in health care services. Obesity bias among health care providers can also affect the quality of care for patients with obesity and compromise the patients' compliance to treatment leading to poor health outcomes and increasing risk of mortality.
A prerequisite to improve knowledge and attitude is to assess it first. Medical students are future doctors whose knowledge and attitude towards patients affect the health care they provide and the consequent outcome of the patient.

Aim of the Work:
The present study explores the problem of obesity bias through assessment of knowledge and attitude among medical students and evaluating the role of medical study in combating this problem through comparing between first and sixth year medical students as regards their knowledge and attitudes towards obese persons.