Diploma thesis "Functional communication by persons with aphasia" describes the issues of aphasia, mainly focused on functional communication. The theoretical part describes the communication, functional communication and aphasia in terms of its etiology, symptomatology and classification. It also describes methods of diagnosis and treatment options. The research part is focused on compiling a questionnaire for functional communication and setting standards for the group of healthy people over 50 years. The main objective of this research is to define influencing parameters such as age, education, laterality, sex.