Research on Attitudes towards people with mental illness and towards people suffering from malignant diseases was conducted on a sample of 271 participants, from whom 123 students were in helping occupation and 148 were non-helping occupation. Helping occupations are the ones students initially educate themselves in Human sciences and that implies direct work with other people and non-helping occupations are the ones working with people is not their primary task. This research objective is to investigate the differences in attitudes of students towards people who are suffering from mental illness and towards people suffering from malignant diseases, depending on types of studies, on sociodemographic characteristics, depending on experiences with members of individual groups and to investigate the differences in sample attribution. The following instruments were used: scale of attitudes about people with mental illness and towards people suffering from malignant diseases, stereotype list, sample attribution, sub list of experiences dealing with people with mental illness and towards people suffering from malignant diseases and questionnaire of sociodemographic data. Given results point to more positive general attitudes from students of helping occupation towards people with mental illness and towards people suffering from malignant diseases unlike students of non-helping occupation. Women and person who have more direct experience in contact with people with mental illness and towards people suffering from malignant diseases have a more positive attitude towards both groups. Students of non-helping occupations are attributing qualities of unpredictable behavior to typical people suffering from mental diseases while students from helping occupations are more inclined of giving them qualities of an emotionally unstable person and are feeling regret towards them. Both of these groups of participants are choosing, for typical people suffering from malignant diseases, non presence of stereotypes. Participants consider mental illness and malignant disease unstable/changeable condition and that the cause is equally connected with person's characteristics as well as external circumstances. Students of helping and non-helping occupations on question of controllability are different in a way that students of non-helping occupation consider the state of mental disorder as something manageable. The findings of this research would be valuable in designing a educational program based on non stigmatization of these two groups of ill people.