Provided is a moisture meter that can easily measure a moisture content of a subject and can be effectively used as means for assisting the subject in appropriately regulating the moisture content. A moisture meter (1) for measuring a moisture content of a subject (M) includes: a probe-type moisture measuring unit (30) that is held in an armpit (R) of the subject (M) so as to measure a moisture content in the armpit (R) in order to measure the moisture content of the subject (M) and a temperature measuring unit (31) that is held in the armpit (R) of the subject (M) so as to measure the temperature of the subject (M). The moisture meter (1) further includes: a main body (10) a measuring unit holder (12) that is sandwiched in the armpit (R) while holding the probe-type moisture measuring unit (30) and the temperature measuring unit (31) and a display unit holder (12) that holds a display unit (20) that displays the measured moisture content of the subject (M) and the measured temperature of the subject (M).
