An object of the present invention is to provide a body-insertable apparatus and an in-vivo information acquiring apparatus which are capable of increasing the frame rate without compression function. The capsule endoscope (2) according to the present invention converts a transfer processing rate at which the signal processing unit (23) reads the in-vivo image from the memory (232), converts the in-vivo image into serial data (Ss), and transfers the serial data (Ss) to a rate higher than a writing processing rate at which the signal processing unit (23) writes the in-vivo image captured by the imaging unit (22) in the memory (232). This shortens the time required for wirelessly transmitting the in-vivo image to the outside after the in-vivo image is captured, so that the imaging unit (22) can capture in-vivo images at short intervals and thus the frame rate is increased.
