An ultrasonic diagnostic device generates an ultrasonic image based on an echo signal obtained by transmitting/receiving ultrasonic waves to/from a subject body. The device is mobile. The device includes an operation panel to input information related to a location where it is used, a CPU to extract a plurality of extension functions that can be used in the input location among a plurality of extension functions that can be extended at the device, and a display portion to display the extracted plurality of extension functions in order to ask the operator to specify at least one desired function among the extracted plurality of extension functions.