A radiation photographing apparatus is provided. A stage driving mechanism 7 assembled with two or more than two straight forwarding driving mechanisms (X shaft/Y shaft straight forwarding motors) are used to move a stage 2 in an assembled trajectory which is a trajectory based on a circular trajectory. Each of the straight forwarding mechanisms 7a, 7b is controlled in a manner that the absolute value of each step of the movement is a positive real number above a predetermined value or zero. The trajectory based on the circular trajectory is set within a range from a small circular, which is half concentric circles of the circular, to a big circular, which is two times concentric circles of the circular.一種放射線攝影裝置,當將載置著對象物的平台2予以驅動時,各個直進驅動機構(X軸/Y軸直進馬達7a、7b)的合成軌道為依據圓軌道的軌道,藉由包含2個以上的直進驅動機構(X軸/Y軸直進馬達7a、7b)的組合的平台驅動機構7來使平台2移動。使每個單位步的移動量的絕對值(驅動量)為具有正實數的值的規定值以上或為“0”,分別對各個直進驅動機構(X軸/Y軸直進馬達7a、7b)進行控制,將自小圓軌道至大圓軌道為止的範圍的軌道作為依據圓軌道的軌道,使平台2移動,上述小圓軌道為圓軌道的一半同心圓,上述大圓軌道為圓軌道的2倍同心圓。2‧‧‧平台PX‧‧‧X座標值PY‧‧‧Y座標值X、Y‧‧‧正交座標系θ‧‧‧角度
