The cheating can be viewed as a major educational problem with a broad social concern. The unethical behaviour of students can crucially influence their qualification, future employment and manners in their professional carrier. The contribution investigates the unethical behaviour of the students of the University of Life Sciences in Prague. The goal is to examine if the students would act unethically in examination tests and in proceeding their assignments. The inquiry investigation based on self-assessments confirmed that the unethical behaviour is quite frequent, more frequent is the exam cheating. The responders do not feel that their behaviour is immoral, they are rather afraid of penalization. The reaction of the teachers and the university is necessary. It is essential to study the reasons of unethical behaviour to apply rectifying measures effectively.