PROBLEM TO BE SOLVED: To determine presence/no presence of deglutition easily.SOLUTION: A deglutition determination device 1 comprises: a microphone 16 capable of outputting a microphone signal corresponding to a sound accompanied with deglutition; an impedance acquisition part 351A for acquiring an impedance of a muscle of a neck; a sound signal acquisition part 351B for acquiring a sound signal Venv; and a determination part 352 for determining presence/no presence of deglutition on the basis of the sound signal Venv and the impedance BI. An AC current from a current supply part 23 is supplied to a pair of electrodes 12a, 12b, and a voltage measurement part 24 measures a voltage between the pair of electrodes 11a, 11b. The impedance calculation part 351 calculates an impedance from a relationship between the measured voltage and the current.SELECTED DRAWING: Figure 3【課題】簡易に嚥下の有無を判定する。【解決手段】嚥下判定装置1は、嚥下に伴う音に応じたマイク信号を出力可能なマイク16と、首の筋肉のインピーダンスを取得するインピーダンス取得部351A、音信号Venvを取得する音信号取得部351Bと、音信号VenvとインピーダンスBIとに基づいて、嚥下の有無を判定する判定部352とを備える。一対の電極12a,12bに電流供給部23からの交流電流を供給し、電圧測定部24が一対の電極11a,11b間の電圧を測定する。インピーダンス算出部351は測定された電圧と電流の関係からインピーダンスを算出する。【選択図】図3