A capsule endoscope system comprising:a capsule endoscope (2) that is inserted into an interior of a subject (1), images image data of the interior of the subject (1), and transmits a radio signal that includes the image data anda receiving apparatus (3) that receives the radio signal and acquires the image data based on the radio signal received, whereinthe capsule endoscope (2) includesa parameter storage unit (25) that stores specific information of the capsule endoscope (2), anda transmitter (26,27) that transmits the radio signal that includes the image data and the specific information included in each line, wherein at least one portion of the specific information is included in each line, which serves as a unit of transmission at the time of transmission of the image data, andthe receiving apparatus (3) includes a control unit (33) that determines whether the image data is effective or ineffective, based on the specific information included in the each line.
