PROBLEM TO BE SOLVED: To raise accuracy in connecting divided object images to improve accuracy in forming a long-sized image.SOLUTION: This radiation image processor inputs a plurality of partial images obtained by dividing and photographing a photographing range including a marker and an object, in a plurality of ranges, which are the partial images having overlap regions overlapping with the adjacent partial images. The radiation image processor sets a first region including a region of a marker image included in the overlap region for every partial image, analyzes an image signal value of a second region which is a region excluding the first region within the overlap region, to determine connecting conditions of the adjacent partial images, and connects the adjacent partial images based on the connecting conditions.COPYRIGHT: (C)2012,JPO&INPIT【課題】分割された被写体画像の結合精度を高め、長尺画像の生成精度を向上すること。【解決手段】マーカ及び被写体を含む撮影範囲を複数に分割して撮影することにより得られた部分画像であって、かつ、隣接する部分画像と重複する重複領域を有する部分画像が複数入力され、部分画像毎に、重複領域内に含まれるマーカ画像の領域を含む第1領域を設定し、重複領域内のうち第1領域を除く領域である第2領域の画像信号値を解析して隣接する部分画像の結合条件を決定し、結合条件に基づいて隣接する部分画像を結合する放射線画像処理装置。【選択図】図5