Intraoral moisture measuring device

An intraoral moisture measuring device comprising:

• a swing member that swings with respect to a main body about a predetermined swing center;
• a capacitance sensor provided at a tip of the swing member, the capacitance sensor being configured to detect a moisture amount by being directly or indirectly abutted against a tongue in a mouth;
• an elastic member being elastically deformed when the swing member swings in one of a plurality of swing directions;
• and
• a controller configured to control the capacitance sensor to start automatically measuring the moisture amount of the tongue when a pressing pressure of the capacitance sensor caused by a restoring force of the elastic member becomes within an appropriate range due to a swinging motion of the swing member, and to stop automatically measuring the moisture amount of the tongue when the pressing pressure of the capacitance sensor caused by the restoring force of the elastic member falls outside an appropriate range due to loosening of the swinging motion of the swing member;
• wherein the controller configured to control the capacitance sensor is configured to start automatically measuring the moisture amount of the tongue when a swing angle of the swing member falls in a range of 30% or more of a full swing range of the swing member.