Provided is, for example, a medical image display device which automatically create and display an image suitable for radiographic image interpretation of interosseous tissue or a 3-dimensional image of a vertebral body separated one by one with high precision. A medical image processing device (1) creates a first conversion image (in step (S1)), extracts a first intervertebral disc region from the first conversion image (in step (S2)), and specifies two coordinates (P1, P2) from among the pixels included in the first intervertebral disc region (in step (S3)). Next, the medical image processing device (1) creates a second conversion image (in step (S4)), extracts a second intervertebral disc region (in step (S5)), and specifies two coordinates (Q1, Q2) from the second intervertebral disc region (in step (S6)). Next, the medical image processing device (1) calculates a reference curved surface including at least four feature points of the coordinates (P1, P2, Q1, Q2) on a per intervertebral disc basis and, based on the reference curved surface, creates a display image (in step (S7)), and displays the display image (in step (S8)).