A capsule type medical device, introduced into the inside of a living body in order to observe the inside of the living body, includes image capturing means for capturing an image of the inside of the living body, wireless communicating means for transmitting the image data of the image captured by the image capturing means to the outside of the living body through a wireless communication, first voltage regulator means for regulating a voltage output from power supply means and for supplying the voltage to the image capturing means, and second voltage regulator means for regulating the voltage output from the power supply means and for supplying the voltage to the wireless communicating means. An oscillating unit included in the wireless communicating means has a differential configuration.
