Background and Objectives: Cheating is a common phenomenon that can undermine the credibility of university tests and certificates. Cheating is a more sensitive issue among medical students. The present study was conducted to investigate the performance and attitude of undergraduate students of Golestan University of Medical Sciences in Iran towards cheating, as well asthe factors that influence cheating. Methods: The present descriptive analytical and cross-sectional study was conducted in 2014 on 524 female and male undergraduate students of Golestan University of Medical Sciences. Convenience sampling was used to select the participants. The data were collected using a valid and reliable 64-item questionnaire on performance and attitude towards cheating with a Cronbach's alpha