A light wave distance meter that irradiates a measurement object with a distance measurement light, and measures a distance to the measurement object based on a reflected distance measurement light that is the distance measurement light reflected by the measurement object, comprising: a light-emitting element that emits the distance measurement light; a light-receiving element that receives the reflected distance measurement light and outputs a light-receiving signal in accordance with the reflected distance measurement light; a frequency conversion unit (31, 39, 43, 44, 48) that includes a bandpass filter that allows a specific frequency band to pass, out of the light-receiving signal output from the light-receiving element, thereby extracting only desired frequency components that are used for measurement of distance, and a timing signal generator that generates a pulse signal of a rectangular wave; an arithmetic control unit that executes arithmetic processing to determine a distance value to the measurement object based on the signal output from the frequency conversion unit (31, 39, 43, 44, 48); a signal generator (33, 34) that generates a signal (s3, s4) having a predetermined frequency; a waveform conversion unit that generates a waveform conversion signal that is constituted of the desired frequency components used for the measurement of the distance; a pulse generator (35, 36) that generates a pulse signal (s5, s6) by pulsating the signal (s3, s4) having the frequency output from the signal generator (33, 34), so as to have a waveform profile of a signal constituted of the desired frequency components used for the measurement of the distance, based on the signal (s3, s4) having the frequency output from the signal generator (33, 34) and the waveform conversion signal output from the waveform conversion unit; and a drive unit that drives the light-emitting element and causes the light-emitting element to emit the distance measurement light based on the pulse signal (s5, s6) generated by the pulse generator (35, 36); wherein the waveform conversion unit converts the waveform profile of the rectangular wave of the pulse signal output from the timing signal generator to generate the waveform conversion signal. a light-emitting element that emits the distance measurement light; a light-receiving element that receives the reflected distance measurement light and outputs a light-receiving signal in accordance with the reflected distance measurement light; a frequency conversion unit (31, 39, 43, 44, 48) that includes a bandpass filter that allows a specific frequency band to pass, out of the light-receiving signal output from the light-receiving element, thereby extracting only desired frequency components that are used for measurement of distance, and a timing signal generator that generates a pulse signal of a rectangular wave; an arithmetic control unit that executes arithmetic processing to determine a distance value to the measurement object based on the signal output from the frequency conversion unit (31, 39, 43, 44, 48); a signal generator (33, 34) that generates a signal (s3, s4) having a predetermined frequency; a waveform conversion unit that generates a waveform conversion signal that is constituted of the desired frequency components used for the measurement of the distance; a pulse generator (35, 36) that generates a pulse signal (s5, s6) by pulsating the signal (s3, s4) having the frequency output from the signal generator (33, 34), so as to have a waveform profile of a signal constituted of the desired frequency components used for the measurement of the distance, based on the signal (s3, s4) having the frequency output from the signal generator (33, 34) and the waveform conversion signal output from the waveform conversion unit; and a drive unit that drives the light-emitting element and causes the light-emitting element to emit the distance measurement light based on the pulse signal (s5, s6) generated by the pulse generator (35, 36); wherein the waveform conversion unit converts the waveform profile of the rectangular wave of the pulse signal output from the timing signal generator to generate the waveform conversion signal.