1. A swallowing test apparatus comprising: a laryngeal part displacement detection apparatus for detecting a distance between two positions located laterally at a laryngeal part of a subject; a swallowing sound detection apparatus for detecting a swallowing sound of the patient during swallowing; a display; and a processing apparatus for displaying a waveform representing the distance of the two positions at the laryngeal part generated based on a signal obtained from the laryngeal part displacement detection apparatus, and a waveform representing the swallowing sound generated based on a signal obtained from the swallowing sound detection apparatus on the display.