1. An ultrasound diagnostic apparatus, comprising: an ultrasound probe; an operating unit configured to perform various operations by an operator; a display unit comprising a first display screen which is a touch panel; an image display unit comprising a second display screen different from the first display screen, the image display unit configured to display an ultrasound image on the second display screen; a selecting unit which is configured by the touch panel; and a controller configured to control operations of the ultrasound diagnostic apparatus on the basis of an instruction signal input from the operating unit and the selecting unit, wherein the controller is further configured to display, in response to an operation using the operating unit by the operator, a plurality of first body marks on the first display screen at a time, each of the first body marks being different from each other in a body pattern which is a patterning of a body part seen in a predetermined direction, and being further superimposed on by a probe mark which indicates a position and a direction on the body pattern which the ultrasound probe is put, display, in response to the operator selecting one body mark from among the plurality of the first body marks, on the touch panel, a series of second body marks corresponding to a series of examinations relating to ultrasound diagnosis in an order of time on the first display screen, each of the second body marks relating to the selected first body mark, and the body patterns of the second body marks being the same for each other in the body pattern of the selected first body mark and being different, from each other in the position and the direction indicated by the probe mark, highlight the second body mark corresponding to an examination being currently executed, and display a body mark corresponding to the highlighted second body mark together with the ultrasound image corresponding to the examination being currently executed on the second display screen.