PROBLEM TO BE SOLVED: To provide a pulse wave analyzer capable of improving accuracy in calculating respiratory variation as an index for grasping hemodynamics of a subject.SOLUTION: A pulse wave analyzer includes a pulse wave acquisition part 2 for acquiring a pulse wave of a subject, a respiratory information acquisition part 3 for acquiring respiratory information of the subject, and an analysis part 4 for calculating respiratory variation from the pulse wave. The analysis part 4 includes a detection part 71 for detecting an occurrence of spontaneous respiration and an expiration terminal period of the spontaneous respiration based on the respiratory information, and an exclusion part 72 for excluding, of the pulse waves, a unit pulse wave occurring immediately after the expiration terminal period of the spontaneous respiration from the pulse waves for calculating the respiratory variation.SELECTED DRAWING: Figure 1【課題】被検者の循環動態を把握する指標としての呼吸性変動を算出する精度を向上させることが可能な脈波解析装置を提供する。【解決手段】被検者の脈波を取得する脈波取得部２と、被検者の呼吸情報を取得する呼吸情報取得部３と、脈波から呼吸性変動を算出する解析部４とを備え、解析部４は、呼吸情報に基づいて、自発呼吸が発生したことを検出するとともに自発呼吸の呼気終末期を検出する検出部７１と、脈波のうち、自発呼吸の呼気終末期の直後に発生した単位脈波を、呼吸性変動を算出するための脈波から排除する排除部７２とを有する。【選択図】図１
