A capsule endoscope apparatus that is configured to be introduced into a subject to acquire information on an inside of the subject and to wirelessly communicate with a receiving apparatus provided outside the capsule endoscope apparatus. The capsule endoscope apparatus includes: an imaging unit configured to capture images of the subject and generate image data of the inside of the subject a transmission unit configured to transmit a wireless signal including the image data, outside the capsule endoscope apparatus a receiving unit configured to receive a control signal for instructing an operation of the capsule endoscope apparatus, the control signal having been transmitted from the receiving apparatus and a capsule controller configured to activate the receiving unit in synchronization with a transmission timing when the transmission unit transmits the wireless signal.
