There has always been some degree of cheating in educational institutions. Many students who have difficulty retaining information, or who are just too lazy to work, turn to cheating as an easy way to obtain high marks. The aims of this study were to investigate undergraduate dental students' attitudes about the seriousness of thirteen cheating behaviors and to determine the students' attitudes about justification for cheating. A multiple choice questionnaire was distributed to 200 undergraduate dental students at the Faculty of Dentistry of the Jordan University of Science and Technology in the second through the fifth year of the curriculum in order to rate thirteen cheating behaviors and report their degree of satisfaction with studying dentistry. The response rate was 100 percent. Nine out of the thirteen cheating behaviors were considered as serious by about 85 percent of students. This majority also reported that they enjoyed studying dentistry compared to 10 percent who liked dentistry and 5 percent who disliked dentistry. Those 85 percent reported that they considered themselves to be ethical, while 10 percent selected somewhat ethical and 5 percent selected not ethical. This study revealed the importance of the issue of cheating and how it is evaluated by dental students who may benefit from educational programs as part of their curriculum.