According to the present invention, in an ultrasound diagnostic apparatus and a control method for an ultrasound diagnostic apparatus, an ultrasound image generation unit is configured to generate an ultrasound image from a reception signal obtained by transmitting and receiving an ultrasound beam to and from an examination area of a subject under examination using the ultrasound probe, and an optical camera is configured to generate an optical image by imaging the subject under examination including the ultrasound probe during examination of the examination area. A probe recognition section is configured to recognize the ultrasound probe from the optical image, and a trimming section is configured to generate a trimmed image by trimming a region including the ultrasound probe from the optical image in a case where the ultrasound probe is recognized. Then, a display control unit is configured to display the ultrasound image and the trimmed image on a monitor. With this, it is possible to enlarge and display an optical image representing a position and an orientation of the ultrasound probe during the examination of the examination area on the monitor.