The object of research is the process of professional training of future bachelors of computer science in higher education institutions. The purpose of the study is to substantiate theoretically, develop and test the model of formation of a healthy lifestyle of future Bachelors of Computer Science in the process of professional training experimentally. The scientific novelty of the obtained results is that: for the first time the model of formation of a healthy lifestyle of future Bachelors of Computer Science in the process of professional training is developed. This model is based on systematic, personality-oriented, action-oriented, holistic, axiological approaches. It is based on general didactic (individual approach; regularity and consistency; activity; nature compliance; connection of learning to life) and specific principles of learning (social hardening; innovation, focus on health-preserving activities), intends to modernize the content of academic disciplines ("Life Safety and Labor Protection", "Valeology", "Physical Education" , "Psychology"), the use of forms (lectures, seminars, laboratory workshops, independent work, debates, discussions), methods (situational role-playing, presentations, case method, brainstorming, portfolio creation, trainings) and means of training (printed, electronic resources, electronic didactic demonstration materials, multimedia tools, electronic reports on the formation of a healthy lifestyle, voice and video chats, audio-visual aids, visual two-dimensional aids, educational devices) and takes into account pedagogical conditions (motivating students to lead a healthy lifestyle in daily activities; creating a safe environment for purposeful enrichment of skills, experience of health preservation based on the use of psychophysiological reserves of students’ organism; organization of independent work of future bachelors of computer science in the direction of development and implementation of individual programs of a healthy lifestyle). The essence of a healthy lifestyle of future bachelors of computer science has been revealed as an integral qualitative characteristic of personality, which combines values, desire for health, acquired knowledge about health and healthy living, the ability to consciously use them in professional activities and is realized through a system of internal and external manifestations of personality to harmonize their individuality with society as well as its structure (cognitive, motivational, behavioral, reflexive components) are revealed. Criteria (knowledge-oriented, value, action-oriented, evaluative) and indicators (knowledge of the content and essence of a healthy lifestyle, components of health and a healthy lifestyle; awareness of the value of their own health and health of others; abilities and skills to follow a healthy lifestyle, the ability to assess and correct their own activities to form a healthy lifestyle) of a healthy lifestyle of future bachelors of computer science have been defined, the levels of its formation (high, medium, low) have been characterized.