PROBLEM TO BE SOLVED: To make it possible to identify a respiratory disease without using a mouthpiece. SOLUTION: The first detecting means (6) for detecting the distance from the body surface of the subject (3) and the first detecting means (6) are arranged at different positions, and the subject (3) ) Of the second detection means (8) for detecting the distance from the body surface, based on the detection results of the first detection means (6) and the second detection means (8) Based on the respiration measurement means (C3) that measures the respiration (Ac(t)) of the removed subject and the detection result of the respiration measurement means (C3), the respiratory system disease of the subject (3) is determined. A respiratory disease determining apparatus (S) including a disease determining means (C4) for determining. [Selection diagram] Figure 1【課題】マウスピースを使用しなくても呼吸器系の疾患を判別可能にすること。【解決手段】被検者（３）の体表からの距離を検出する第１の検出手段（６）と、第１の検出手段（６）とは異なる位置に配置され、被検者（３）の体表からの距離を検出する第２の検出手段（８）と、第１の検出手段（６）の検出結果と第２の検出手段（８）の検出結果に基づいて、体動を除いた被検者の呼吸（Ａｃ（ｔ））を計測する呼吸計測手段（Ｃ３）と、呼吸計測手段（Ｃ３）の検出結果に基づいて、被検者（３）の呼吸器系の疾患を判別する疾患判別手段（Ｃ４）とを備えた呼吸器系疾患判別装置（Ｓ）。【選択図】図１
