The burden on a patient is reduced, and acquired measurement information is readily and reliably collected. A capsule-type medical device (10) is provided, including a capsule-type casing (12) that is introduced into a body cavity of a patient, a measurement-information acquisition unit (20) that is disposed inside the casing and that acquires measurement information about a site to be examined in the body cavity an IC chip (32) that stores the measurement information acquired by the measurement-information acquisition unit (20) a capsule antenna (34) that receives from outside the body cavity a measurement-information-reading signal and that transmits outside the body cavity the measurement information stored in the IC chip (32) a pH sensor unit (40) that determines a passing position by acquiring positional information in the body cavity and a buzzer (50) that issues a notification sound outside the body cavity when the passing position determined by the pH sensor unit (40) satisfies a predetermined positional condition.
