The research is devoted to the study of the attitude of law enforcement officials, civil servants and ordinary citizens to the institute of corruption whistle-blowers on the example of Ukraine. To this end, 351 people were interviewed. Generalized results indicate that the vast majority (75%) of Ukrainian citizens are aware of the institute of corruption whistle-blowers. Ukrainian society has a positive attitude to the corruption whistle-blowers, (51,6%) of those who were interviewed believe that the whistle-blowers fulfil an important mission. The willingness of Ukrainians to participate in exposure of corruption is lower (39,3%) than the number of people who approve activities of the whistle-blowers. It also avouches that not all conditions, including the social and legal protection of whistle-blowers, have been created in Ukraine. There is a high risk of persecution, including from public authorities, according to (89,4%) respondents. The existing system of protection of whistle-blowers is declarative (68%), and there are no positive examples of whistle-blower activity in Ukraine (29,3%). There are differences in the attitude of different categories of citizens to the whistle-blowers of corruption. The most support (63,3%) whistle-blowers received from representatives of the Security Service of Ukraine, border guards (59,4%), police officers (50%), ordinary citizens (50,6%). Civil servants less approve the institute of corruption whistle-blowers and support (45,9%). The lowest rate (40%) was shown by the representatives of the law enforcement agencies. Average citizens and civil servants (14,7%) showed the highest percentage of distrust in the work of whistle-blowers (15,7%).