A capsule endoscope 3 as an example of a body-insertable apparatus includes a battery 100, a control information detecting circuit 31 to which driving power is supplied from the battery 100, a system control circuit 32, and a driving controller 34 that is arranged between the battery 100 and the control information detecting circuit 31 and the system control circuit 32. The driving controller 34 controls driving of the control information detecting circuit 31, the system control circuit 32 or the like based on a temperature detected by a temperature sensor unit 33, thereby preventing actuation of the capsule endoscope 3 outside the body of a subject.