To provide an X-ray fluoroscopic apparatus for collimators and X-ray fluoroscopic imaging apparatus that can maintain a constant illuminance irrespective of the differences and sighting light deterioration of the illuminance due to individual differences of the aiming lamp. The apparatus includes a sighting lamp 4 for irradiating with light the same area as the X-ray irradiation area Wx, and CdS light detector 7 for detecting the illuminance of aiming for the lamp 4, in response to the detection result of CdS light detector 7 surface and a illumination control means for adjusting the illumination intensity of the aiming lamp 4, the light of a movable leaf 5 which moves a CdS light detector 7 in the X direction near the sighting lamp 4 side (the left and right relative to the drawing sheet) strikes Installed above.BACKGROUND.【課題】照準用ランプの個体差による照度の違いや照準用ランプ劣化にかかわらず照度を一定に保つことができるX線透視撮影装置用コリメータおよびX線透視撮影装置を提供する。【解決手段】X線照射領域Wxと同じ領域を光で照射する照準用ランプ4と、照準用ランプ4の照度を検出するCdS光検出器7と、CdS光検出器7の検出結果に応じて照準用ランプ4の照度を調整する照度制御手段とを有し、CdS光検出器7を照準用ランプ4に近い側のX方向(紙面に対し左右)に移動する可動リーフ5の光が当たる面上に設置する。【選択図】図1
