An X-ray diagnostic apparatus according to an embodiment includes an X-ray generator configured to generate X-rays, a grid configured to remove scattered rays from the X-rays emitted from the X-ray generator, an X-ray detector configured to detect the X-rays that have passed through the grid, a first support configured to support the grid, and a second support configured to support the grid. The number of directions in which the first support restricts movement of the grid is different from the number of directions in which the second support restricts movement of the grid.