[Objective] Providing a medical image diagnostic apparatus which can mitigate an operational burden at the time when measurement processing is performed by use of a medical image. [Means for Solution] An ultrasonic diagnostic apparatus 100 acquires input image information, which is image data of a subject, and holds it in a storage section 3. An image selection section 8 performs image recognition calculation for comparison between the input image information and past image information pieces of an image measurement database 7. When the image recognition has succeeded, a measurement-position setting section 9 refers to a record of image measurement information including a past image information piece most similar to the input image information, retrieves measurement position information of the record, and sets it. A measurement-position setting processing section 6 displays the measurement position on a display section 12 such that it is superimposed on the input image information 21. A measurement calculation section 11 performs measurement calculation for the measurement position set by the measurement-position setting section 9, and displays measurement results on the display section 12. The measurement-position setting processing section 6 updates the image measurement database 7 on the basis of the input image information, the measurement position set by the measurement-position setting section 9, etc.