There is provided in a substantially rectangular sound-recording apparatus including: two first audio acquirers to which audio is stereophonically inputted; a second audio acquirer to which audio is monophonically inputted; and a supporter for holding the sound-recording apparatus in a predetermined attitude, in which the first and second audio acquirers are placed on different surfaces, and the two first audio acquirers are placed at both ends of a longer side of the main body, a sound-recording apparatus including an opening and closing sensor for sensing an opened and closed state of the supporter, and an attitude sensor for sensing an attitude of the sound-recording-apparatus main body, in which based on a sensing result of the opening and closing sensor and a sensing result of the attitude sensor, a stem sound-recording and a monophonic sound-recording are switched.