A sound collector includes a first microphone unit and a second microphone unit having a single directivity and being pivotally supported in a manner that directions of directional axes of the units are changeable in an identical flat plane and a switch to be controlled in conjunction with the rotations of the first and the second microphone units. Output signals of the first and the second microphone units are outputted with channels of the signals being exchanged or non-exchanged by the switch in accordance with an angle formed by the directional axes.