An X-ray diagnostic apparatus according to one embodiment includes an X-ray generating device, an X-ray detector, an image generation device, a display device, a portion detection device, and an attenuation device. The X-ray generation device generates X-rays to irradiate an object. The X-ray detector detects X-rays transmitted through the object. The image generation device generates an X-ray image based on the detected X-rays. The display device displays the X-ray image. The portion detection device detects an exposure dose reduction target portion based on the X-ray image. The attenuation device attenuates the X-rays to irradiate a region including the detected portion.
