In order to offer the image processing device which can do the density of the long shaku picture which is the connecting picture which connects the plural x-ray pictures and to control the variation of contrast, image processing device 6, all x-ray pictures where it can arrange density and contrast the plural x-ray pictures which overlap partly (20,21,22) the picture memory with the density contrast revision section 64 which does the density of 62 which remembers the data and the plural x-ray pictures and the processing which arranges contrast and density contrast revision section 64 (20,21 and 22 ) to connect, in the long shaku photographing territory of suffering inspection body MIt possesses with the long shaku picture acquisition section 65 which acquires the long shaku x-ray picture which corresponds. As for density contrast revision section 64, the gradation translation table which makes that density and contrast are arranged possible (AB and BC) the 1st table compilation department 642 which is acquired and the gradation translation table (AB and BC) of on the basis two x-ray pictures which among the plural x-ray pictures are adjacent (20,21 or 21,22) the areas of overlap (20a, 21a, 21b and 22a) on the basis of image information, two x-ray pictures (20,21 or 21,22), the plural x-ray pictures (20 - 22) from the standard x-ray picture which is selected (20) with the remaining x-ray picture other than the said standard x-ray picture (21,22) the remaining x-ray picture (21,22) it possesses with density and the equalization processing section 644 which executes the processing which arranges contrast the 2nd gradation translation table which makes that density and contrast are arranged possible (BA and CB) the 2nd table compilation department 643 which is acquired and, the 2nd gradation translation table (BA and CB) of on the basis.複数のX線画像を接合した接合画像である長尺画像の濃度とコントラストのばらつきを抑制することができる画像処理装置を提供するために、画像処理装置6は、部分的に重複する複数のX線画像(20,21,22)のデータを記憶する画像メモリ62と、複数のX線画像の濃度とコントラストを
