The present invention limits measurement error and sensor element damage. When a contact-type sensor (200) is placed in contact with skin (10), a gap (200a) is formed between the skin (10) and a sensor element (214). The contact-type sensor (200) is provided with a water-repellent resin base plate (212) and a water-absorbing sheet (211) that, together with the skin (10) and the sensor element (214), surround the gap (200a).
