PROBLEM TO BE SOLVED: To provide a mastication detector capable of precisely and easily detecting mastication and an eating habit management system.SOLUTION: A mastication detector comprises: a sensor 12 for outputting a detection signal according to a fluctuation amount of a detected portion on a head； mastication detection section determination means 46 for comparing a value based on the detection signal with a threshold value for determining magnitude of the fluctuation amount, for distinguishing a mastication detection section in which the fluctuation amount is large with a mastication detection section in which the fluctuation amount is small； and mastication number counting means 48 for counting a mastication number. The mastication number counting means 48 counts the mastication number in only the mastication detection section.SELECTED DRAWING: Figure 4【課題】正確かつ簡単に咀嚼を検出可能な咀嚼検出装置及び食習慣管理システムを提供する。【解決手段】頭部における被検知部位の変動量に応じた検知信号を出力するセンサ１２と、検知信号に基づく値と変動量の大小を判別するための閾値とを比較することで、変動量の大きい咀嚼検出区間と変動量の小さい非咀嚼検出区間とを判別する咀嚼検出区間判別手段４６と、咀嚼回数を計数する咀嚼回数計数手段４８と、を備え、咀嚼回数計数手段４８は、咀嚼検出区間のみで咀嚼回数を計数する。【選択図】図４
