The purpose of the present invention is to improve the waterproofing / anti-soiling property of the body water meter. This body water meter (100) is provided with a main body section (110) that is formed in a linear shape, and an insertion section (120) that extends in a curve from one end of the main body section (100), and is characterized in that: the insertion section (120) is provided with a tip-side insertion section (120-2) on the tip surface (122) of which a sensor (121), for measuring data relating to the moisture content in the body by being placed in contact with the body surface of the subject, is affixed, a base end-side insertion section (120-1) for supporting the tip-side insertion section (120-2) via a sliding mechanism that slides the tip-side insertion section in a direction substantially orthogonal to the tip surface (122), and a protective member (651) for covering the sliding mechanism between the tip-side insertion section (120-2) and the base end-side insertion section (120-1) in a liquid-tight manner and the protective member (651) is configured to smoothly connect the peripheral surface of the tip-side insertion section (120-2) and the peripheral surface of the base end-side insertion section (120-1).La présente invention concerne lamélioration de la propriété dimperméabilité à leau/antisalissure dun humidimètre corporel. Cet humidimètre corporel (100) est doté dune section de corps principal (110), qui est de forme linéaire, et dune section dinsertion (120) qui sétend sous forme de courbe depuis une extrémité de la section de corps principal (100), et est caractérisé en ce que : la section dinsertion (120) est dotée dune section dinsertion du côté de la pointe (120-2) sur la surface de pointe (122) au niveau de laquelle un capteur (121), destiné à la mesure de données relatives à la teneur en humidité dans le corps par positionnement en contact avec la surface corporelle du sujet, est fixé, dune section dinsertion du côté de lextrémité de b
