The embodiments of the probe in the ultrasound imaging diagnostic apparatus include at least one rigid interface device for connecting a high-density acoustic array and a predetermined low-density device while maintaining one-to-one connection. The rigid interface provides a first connection area having a predetermined high density and a second connection area having a predetermined medium density that is lower than the high density. The second connection area offers a connection surface for connecting a predetermined low-density device having a predetermined low density that is lower than the medium density.
