In an automatic telephone message management apparatus connectable with two telephone lines, while a message is recorded on an analog recording cassette tape in response to a telephone call received via one of the two telephone lines in the automatic telephone message management operation mode of the apparatus, when another telephone call is made on the other telephone line, the apparatus operates also in the automatic telephone message management operation mode for the other telephone line, and a message received via the other telephone line is temporarily recorded in a digital IC memory. After completion of recording of the messages received via both of the two telephone lines, the message recorded in the digital IC memory is reproduced and subjected to D/A conversion, and then transferred to the analog recording cassette tape to be recorded thereon.