A communication terminal capable of preventing a circuit from being released when a hook key is operated in the case the circuit is being closed forcibly. The communication terminal is capable of informing the functions capable of being used in the case the circuit is being closed due to the malfunction of the recording unit. If a recording unit fails to operate and the image memory is exhausted, and when it is set to close the telephone line based on the operation of the circuit closing key, the facsimile receiving is prevented from being carried out by closing the telephone line. The operation of the hook key is invalidated under this condition. Therefore, the telephone line is not released even if the hook key is operated. Thus, when the telephone line is being closed forcibly, the telephone line L is not released even if the hook key is operated.