An X-ray image diagnosis apparatus according to embodiments includes: a table on which an examinee lies down; a table driving unit configured to move the table upward and downward; an imaging device configured to take a side image of the examinee by irradiating a side of the examinee on the table with X-rays and detecting X-rays transmitted through the examinee; and a controller configured to control the table driving unit so that the table driving unit moves the table upward or downward to make a center position of the examinee on the table in a thickness direction of the examinee coincide with a center position of the side image in an upward-downward moving direction of the table.