The popularity of the topic is determined by new stages of development of the system of education, its new developing stages as well as the introduction of new methods in educational activities. Consequently, changes should be involved in teacher's work. The teacher must always develop himself as a person to improve his skills and to keep pace with the modern period. The necessity of teachers' development is described in the article and some approaches to professional personal development of teachers, such as historical, philosophical approach, are discussed. Teacher's personality is very important in modern education. The issues of development and formation of a teacher as a personality are reflected in the ideas of famous teachers of the past. Many of them have changed over time. The teacher of modern school should be able to provide conditions for the development of an individual, making the process manageable; he must be a competent, well-trained professional. Teacher work never ends. It always has to be improved. If the teacher rests on his laurels, he stops to be a teacher. The teacher must be in constant motion, to develop himself as a person and only then he will be able to apply his knowledge and skills to engage students in the process of interaction in creative activities and improve the level of education.