To precisely prevent excessive exposure by accurately managing an exposure dose of a patient by each body part without a burden on an operator, in an examination using an X-ray radiographing apparatus.

The measurable amount for each body part of a patient is calculated in real time and displayed. The measurable amount is an allowable see-through time in the case of see-through measuring, and is an allowable photographing number of sheets in the case of photographic measuring. Further, an accumulated exposure dose may be configured to be displayed at the same time. In such event, the display of the accumulated exposure dose may be configured to be performed in accordance with a color scale preassigned on a human body model image on hand in advance.