Compared to the exposure of all territory where the x-ray is irradiated simply phantom and the x-ray photographing device which are used for measurement possible dose measurement method and this measurement method are offered. Installing the film type dosimeter in phantom, the occasion where it measures the dose, it arranges in phantom the film type dosimeter, according to the plane surface which includes the medial axis where the rotary center of the x-ray source which turns is located or the plane surface which crosses the medial axis. Especially, with phantom, as at least the 1st base substance and it divides into the 2nd base substance the film type dosimeter according to the plane surface which distribution facilities is done, with this 1st base substance and the 2nd base substance the film type dosimeter holding is locked.より簡便にX線が照射されている全領域の照射線量を計測可能な線量計測方法及びこの計測方法に用いるファントム並びにX線撮影装置を提供する。ファントムにフィルム型線量計を装着して線量を計測する際に、フィルム型線量計を、回転するX線源の回転中心が位置する中心軸を含む平面、または中心軸を横断する平面に沿ってファントムに配置する。特に、ファントムでは、フィルム型線量計が配設される平面に沿って少なくとも第1の基体と第2の基体とに分割するとともに、この第1の基体と第2の基体とでフィルム型線量計を挟持固定する。
