This invention relates to a facsimile apparatus for implementing an automatic transmission of a meaningful response to a document received from the facsimile apparatus on the other terminal of a communication line. Thereby, the addresser of the document will be notified of the receipt of the document or a receiving condition of the addressee when the transmission of the response is postponed. Further the immediate answer to the document will be received by the addresser of the document. The facsimile apparatus comprises a mode conversion unit for converting its mode from the reception operation into the transmission operation and vise versa upon completion of the reception and completion of the transmission respectively; therefore the transmission/reception of the document and the response will be conducted at the signal communication.