Provided is a capsule endoscope system that prevents an image signal transmitted from a capsule endoscope from being processed as examination information when the capsule endoscope has a failure. The capsule endoscope system includes a capsule endoscope that transmits an image signal acquired by imaging an object, a receiving unit that receives the image signal, an image display unit capable of displaying an image based on the image signal, a position detection unit that detects the position of the capsule endoscope, and a control unit 150 having an image signal determination unit 153 that determines whether normal image display based on the image signal is possible and a position detection determination unit 154 that determines whether normal position detection for the capsule endoscope is possible. The control unit 150 controls the image display unit in accordance with results of the determination. When it is determined that normal image display is possible and normal position detection for the capsule endoscope is possible, the control unit 150 causes the image display unit to start display of an image based on the image signal.
