A medical image display apparatus of the present invention is used in a medical image display system having a function of preparing three-dimensional image data on a subject including a plurality of luminal organs and displaying the prepared three-dimensional image data on a display (15) as a three-dimensional image. The medical image display apparatus includes a curved-surface creation section (31) which specifies a desired luminal organ in an image showing the plurality of luminal organs displayed on the display (15) and sets a curved surface where the specified desired luminal organ is present; a developed-image creation section (33) which extracts, from the three-dimensional image data, pixel values on the curved surface set by the curved-surface creation section (31), creates curved-surface image data by use of the extracted pixel values on the curved surface, and reconstructs two-dimensional image data (developed image data) from the created curved-surface image data; and a CPU (11) which controls the display (15) so as to display the developed image data reconstructed by the developed-image creation section (33).