We show the data of diagnostic research, main aim is to analyze the development level of structural components of students creative thinking. Creative thinking is interpreted as a profes-sionally-oriented thinking characterized by the ability to generate a lot of original ideas in unregu-lated conditions of activity, developed verbal creativity and insight, a high level of reflection, in-quisitiveness, imagination, self-control of emotional states. We consider it as the most important factor influencing personal and professional self-change of students – future psychologists. We re-veal the indicators of creative thinking development and the diagnostic tools for their evaluation are substantiated, identify and analyze the main problem areas in the development of creative thinking of students (low level of verbal activity, lack of curiosity, lack of understanding of the need for further work on the development of imagination). Using diagnosis we reveal the relation-ship between the individual psychological characteristics of the personality of students-psychologists and their predominant types of thinking: subject, symbolic, symbolic and imagina-tive. We obtain the analysis results using a five-factor personal questionnaire by R. McCrae and P. Costa which allows to make a personal portrait of the subjects by many factors: extra – version – introversion, attachment – isolation, self-control – impulsiveness, emotional stability-instability, expressiveness-practicality. We reveal the difficulties in the development of creative thinking, which meet students with a focus on the prevalence of one of the indicators in a particular pair. We present the factor analysis results of the obtained data carried out by principal component analysis with the construction of the correlation matrix and subsequent orthogonal rotation. Correlation analysis showed that the students' scale of creativity correlates with such indicators as imagination, creative thinking, activity – passivity, domination – submission, manifestation – avoidance of guilt, extroversion – introversion, credulity – suspicion, curiosity – conservatism, curiosity – realism, activity component. The results of the study can be used in the educational programs development aimed at the students’ creativity development and personal and professional competencies formation of future psychologists in high school.