To reliably specify the presence or absence of excrement from an ultrasound image. In an ultrasound diagnostic apparatus and a control method for an ultrasound diagnostic apparatus according to the present invention, an excrement information detection unit detects an excrement region from an ultrasound image, and an excrement specifying unit specifies the presence or absence of excrement based on a detection result of the excrement region. As a result, in a case where it is specified that excrement is present, an excrement information display unit highlight-displays the excrement region in the ultrasound image displayed on a monitor, and in a case where it is not specified that excrement is present within a predetermined period, a notification unit notifies a user of a message suggesting a change of an approach of an ultrasound probe during performing scanning.