An acoustic noise suppressing apparatus outputs a first suppression audio signal in which the acoustic noise is suppressed by subtracting a first pseudo noise signal from the picked up audio signal, the first pseudo noise signal being generated based on a first delay signal and a first filter updated by a first algorithm which is valid when a plurality of talkers are talking, and outputs a second suppression audio signal in which the acoustic noise is suppressed by subtracting a second pseudo noise signal from the picked up audio signal, the second pseudo noise signal being generated based on a second delay signal and a second filter updated by a second algorithm which is valid when one talker is talking. The apparatus outputs a suppressed one of the first suppressed audio signal or the second suppressed audio signal.