In tomographic image data, a reference region-setting unit (30) sets a body reference region for the body of a fetus and sets a cardiac reference region for the heart of the fetus. A body shift analysis unit (50) analyzes the movement of the fetus body in the tomographic image data using the body reference region and obtains body shift information. A cardiac motion analysis unit (60) analyzes the movement of the fetus heart in the tomographic image data using the cardiac reference region and obtains cardiac motion information. Once body shift information and cardiac motion information are obtained in this manner, a pulse information-processing unit (70) obtains fetal pulse information on the basis of the cardiac motion information from which the body shift information has been subtracted. The pulse information obtained by the pulse information-processing unit (70) is displayed on the display unit (80).
