Problem-based learning is studies strategy which involves students into confrontation with practical problems which stimulate their learning. Idea of problem-based learning is based on three principles: scenario of case or real problem, work in small group under the guidance of tutor, and self-education. In the learning process, students acquire thorough knowledge and ability to apply them creatively. On the basis of analysis of results of questionnaire survey of two groups of students, peculiarities of changes of roles of students and lecturers in implementation of problem-based learning system in medium of traditional features of university have been disclosed. With changing of lecturer's role from conveyor of information to learning assistant, conflict of traditional and modem attitudes towards a student shows up and this conflict conditions problems of realization of tutor's functions, and with changing of student's role from passive assignee of information to active participant in study process, features of attachment to lecturer as source of information show up and they obstruct successful learning in group solving learning problems
