The author presents some methods of special logopaedic examinations of children hospitalized in a psychiatric sanatorium for children. This diagnosis is part of a multidimensional evaluation of the child and the basis for the special development of verbal performance. The author mentions therapeutic methods some diagnostic groups and emphasizes that this work is irreplaceable in the comprehensive concept of paedopsychiatric treatment. Effective logopaedic assistance depends on professional skill which is not taught to teachers at present. In the conclusion the author submits the demand that specialists in this field should be according to norms on the staff of these institutions and should not be engaged only on an optional basis.