Objective: This study was conducted to determine the effect of patient safety attitudes and cultures on medical errors in intern students studying health sciences (OR: studying in health sciences faculty). Materials and Methods: The sample of this descriptive and cross-sectional study composed of intern students (n=624 people; Nursing, Midwifery and Health Management Department, Dentistry, Medicine and Faculty of Pharmacy) studying health sciences during the 2017–2018 academic year at Cumhuriyet University. The data were collected by the “Student Description Form”, “Patient Safety Culture Scale (PSCS)” and “The Safety Attitudes Questionnaire (SAQ)”. Median (min-max), percentage distribution and Kruskal-Wallis test were used for statistical evaluation. Results: Of senior students in the study, 24% of them are from medical faculty, 11.1% from dentistry faculty, 35.6% from the department of nursing, 11.4% from the department of midwifery, 15.2% from the department of health management and 2.7% of them are from the faculty of pharmacy. In terms of patient safety, the most common medical errors made by students are drug errors (50.8%) and communication errors (24.4%). The most common drug errors made by the students are giving the wrong medication (16.7%) and giving the wrong dose of medication (14.8%). The culture (2.88 (1.00–3.90)) and attitudes (160 (81.00–193.00)) of students towards patient safety are positively above the average. Those who perform fall-related errors and drug errors have a more negative patient safety culture score. In terms of scale scores, the most negative course was performed by the ones giving the wrong drugs to patients among the error types made with the drug. The attitude towards patient safety between intern pharmacy and medical students is more negative than the other departments (p<0.05). Conclusion: It has been determined that the patient safety culture and attitudes of students are not at the desired level and this increases the frequency or probability of the occurring medical errors.