To provide a method and a device for ultrasonic imaging, which enable the detection of a subharmonic echo without decreasing temporal resolution.

The method for the ultrasonic imaging is characterized by including a process such that an ultrasonic contrast medium is irradiated with ultrasonic waves on condition that the equal subharmonic echoes can be obtained when the ultrasonic waves are radiated twice or more at arbitrary time intervals, for the purpose of utilizing the generated subharmonic echoes.