An operation panel display device (38a, 38b, 30) for a medical X-ray photography apparatus (10; 10B), the operation panel display device comprising: a display panel including a display region including a photography mode selection region configured to display a plurality of photography mode selection images (63, 64, 65, 66) corresponding to a plurality of X-ray photography modes, an illustration display region configured to display an illustration image (72, 73, 73a, 74, 75, 76, 76E) corresponding to said plurality of X-ray photography modes; an operation receiver configured to receive an operation regarding an image displayed on said display panel, wherein when a selection operation for one of said photography mode selection images (63, 64, 65, 66) is received, a selected photography mode selection image (63, 64, 65, 66) is displayed in a visually distinguishable manner in said photography mode selection region according to said selection operation, and said illustration image (72, 73, 73a, 74, 75, 76, 76E) corresponding to said selection operation is displayed in said illustration display region; said display region includes a first photography condition setting region, and said first photography condition setting region is a region configured to display a plurality of first photography condition setting images for setting a first photography condition according to said selection operation with respect to one of said plurality of photography mode selection images, and wherein through a further selection operation of one of said plurality of first photography condition setting images displayed in said first photography condition setting region, a plurality of photography condition setting images, corresponding to the further selection, are displayed in said illustration display region, instead of said illustration image (72, 73, 73a, 74, 75, 76, 76E). a display panel including a display region including a photography mode selection region configured to display a plurality of photography mode selection images (63, 64, 65, 66) corresponding to a plurality of X-ray photography modes, an illustration display region configured to display an illustration image (72, 73, 73a, 74, 75, 76, 76E) corresponding to said plurality of X-ray photography modes; a photography mode selection region configured to display a plurality of photography mode selection images (63, 64, 65, 66) corresponding to a plurality of X-ray photography modes, an illustration display region configured to display an illustration image (72, 73, 73a, 74, 75, 76, 76E) corresponding to said plurality of X-ray photography modes; an operation receiver configured to receive an operation regarding an image displayed on said display panel, wherein when a selection operation for one of said photography mode selection images (63, 64, 65, 66) is received, a selected photography mode selection image (63, 64, 65, 66) is displayed in a visually distinguishable manner in said photography mode selection region according to said selection operation, and said illustration image (72, 73, 73a, 74, 75, 76, 76E) corresponding to said selection operation is displayed in said illustration display region; said display region includes a first photography condition setting region, and said first photography condition setting region is a region configured to display a plurality of first photography condition setting images for setting a first photography condition according to said selection operation with respect to one of said plurality of photography mode selection images, and wherein through a further selection operation of one of said plurality of first photography condition setting images displayed in said first photography condition setting region, a plurality of photography condition setting images, corresponding to the further selection, are displayed in said illustration display region, instead of said illustration image (72, 73, 73a, 74, 75, 76, 76E).