A position information providing apparatus for providing present position information indicating a present position to a position notifier apparatus having a function to notify the present position, the position information providing apparatus comprising: an ultrasonic wave output device that outputs ultrasonic wave having a predetermined ultrasonic frequency; a controller that has a plurality of predetermined detectable frequencies which are within a frequency range detectable by a speech input device of the position notifier apparatus and which are lower than the ultrasonic wave frequency, sequentially selects one detectable frequency as a modulation frequency from among the plurality of detectable frequencies in accordance with contents of the present position information, and controls the ultrasonic wave output device so that a maximum value or a minimum value of amplitude of the ultrasonic wave varies with the selected modulation frequency, characterized in that the ultrasonic wave output device includes a plurality of first ultrasonic speakers for outputting the ultrasonic wave that is normal-phase, and a plurality of second ultrasonic speakers for outputting the ultrasonic wave that is reverse-phase; the plurality of first ultrasonic speakers are arranged in an outward spiral from a predetermined center point along an installation surface, wherein the installation surface is perpendicular to an ultrasonic wave output direction in which the ultrasonic wave output device outputs the ultrasonic wave; the plurality of second ultrasonic speakers are arranged in an outward spiral from the predetermined center point along the installation surface; and the plurality of first ultrasonic speakers and the plurality of second ultrasonic speakers are alternately arranged in an outwardly radial direction from the predetermined center point. an ultrasonic wave output device that outputs ultrasonic wave having a predetermined ultrasonic frequency; a controller that has a plurality of predetermined detectable frequencies which are within a frequency range detectable by a speech input device of the position notifier apparatus and which are lower than the ultrasonic wave frequency, sequentially selects one detectable frequency as a modulation frequency from among the plurality of detectable frequencies in accordance with contents of the present position information, and controls the ultrasonic wave output device so that a maximum value or a minimum value of amplitude of the ultrasonic wave varies with the selected modulation frequency, characterized in that the ultrasonic wave output device includes a plurality of first ultrasonic speakers for outputting the ultrasonic wave that is normal-phase, and a plurality of second ultrasonic speakers for outputting the ultrasonic wave that is reverse-phase; the plurality of first ultrasonic speakers are arranged in an outward spiral from a predetermined center point along an installation surface, wherein the installation surface is perpendicular to an ultrasonic wave output direction in which the ultrasonic wave output device outputs the ultrasonic wave; the plurality of second ultrasonic speakers are arranged in an outward spiral from the predetermined center point along the installation surface; and the plurality of first ultrasonic speakers and the plurality of second ultrasonic speakers are alternately arranged in an outwardly radial direction from the predetermined center point.