Eating attitude is a fundamental element that directly affects someones whole life. It has an important effect especially on the performance in the working life. This study is made to analyse the effect of eating attitude of health personnel, working in the hospital, on their working performance. In order to gather data in the study, scales regarding eating attitude and personnel performance are used. The study was carried out between 15.01.2021-30.02.2021 in the university hospital in the centre of SanlIurfa and 390 health personnel participated. 62.7% of the 390 health personnel state that they define themselves with normal weight according to the classification of body mass index, 76.2% of them state that they skip a meal, 81.2% of them state that their eating attitude is normal. According to the results of both correlation and regression analyses, it is determined that eating attitude of health personnel has effect on their working performance. According to the correlation analysis, as the eating attitude gets worse, working performance also decreases. According to the standardized regression coefficient, it is expected that a 1-unit increase in the scale of eating attitude leads 0.235- unit increase in working performance. Hence, improvements in the eating attitude of health personnel would be an important step towards an increase in working performance. As a result of the study, it is found out that eating attitude increases working performance of health personnel by affecting it.