The capsule medical apparatus of the present invention including an information acquisition section that acquires information on the inside of a test subject comprises a plurality of communication electrodes that are disposed on the surface of the capsule medical apparatus and capable of communication for outputting the information acquired by the information acquisition section to the outside of the test subject, a signal conversion section that converts an electric signal outputted according to the information acquired by the information acquisition section into electrode drive signals for driving the communication electrodes by inducing a potential difference therebetween, a signal output switching section that switches between output states of the electrode drive signals, and a signal switching control section that controls the signal output switching section based on the output state of the electric signal to stop outputting the electrode drive signals during the period in which the electric signal is not outputted.
