Objective: The aim of the research is to examine the student's attitudes of health and non-health studies about euthanasia and the patient's right to co-decision about treatment procedures in the terminal phase of the disease, and the connection of attitudes with certain characteristics of the respondents. Methods and respondents: The research examined the attitudes of 289 students from various years of chosen health and non-health studies at the University of Split. The data were collected using an anonymous questionnaire that includes sociodemographic data about respondents, a scale of attitudes about passive euthanasia and a scale of attitudes about the patient's right to co-decision about treatment procedures. Results: Students' attitudes towards euthanasia are more positive in situations where the patient's autonomy and freedom of choice are respected, i.e. when he himself makes the decision to end his own life. A significant part of the respondents were indecisive, or abstained from giving a decisive answer regarding the euthanasia of children and patients in a vegetative state. Religiosity and political worldview have a statistically significant influence on respondents' attitudes about passive euthanasia. A very high percentage of respondents support the patient's right to co-decide on treatment procedures. There is no difference in attitudes between students of the first and final years of studies regarding patients' right to co-decision, but students of health studies have more positive attitudes compared to students of non-health studies. Religiosity and gender have a statistically significant influence on attitudes about patient rights. Conclusion: The research points out the need for a multidisciplinary approach to euthanasia and the patients' right to co-decision, and contributes to the larger public debate on this issue.