A manual includes a reference and illustrative source allowing to the students and practicing speech therapists to specify and complement the knowledge of speech therapy. The table of contents of book reflects universal character of speech therapy profession. In a book necessary for speech therapists information is collected on анатомо-физиологической organization of speech, linguistic knowledge, historical and modern looks to nature of allolalias and methods of her correction. A book is addressed to the students, studying speech therapy, to the speech therapists, specialists working in area of the special pedagogics and psychology. Materials of book can be useful to the teachers, educators, parents of children with allolalias.