PROBLEM TO BE SOLVED: To provide a respiratory illness determination device which determines whether there is a prior sign of an occurrence of the symptoms of respiratory illness, without a burden on a patient.SOLUTION: A respiratory illness determination device 1 comprises: an ultrasonic sensor 6 (ultrasonic wave detector) which, when the respiratory tract is narrowed as a prior sign of the occurrence of the symptoms of the respiratory illness of a patient, detects ultrasonic waves emitted with a respiratory movement and a determination section 18 which determines whether there is the sign, on the basis of the ultrasonic wave detected by the ultrasonic sensor 6.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】呼吸器疾患の判定装置において、被検者に負担を与えることなく、呼吸器疾患の症状が発現する前の予兆の有無を判定する。【解決手段】呼吸器疾患の判定装置1は、被検者の呼吸疾患の症状が発現する前の予兆として気道が狭くなったときに、呼吸動作に伴って発せられる超音波を検出する超音波センサ6(超音波検出器)と、超音波センサ6で検出された超音波に基づいて、予兆の有無を判定する判定部18と、を備える。【選択図】図2