X-ray fluorescence spectrometer

1. Field of the Invention To provide an X-ray fluorescence spectrometer of a simplified structure of a type in which a sample can be transported to an irradiating position where the sample is irradiated with primary X-rays and analysis can be achieved by positioning a target area to be measured of the sample. When an r drive means drives an r drive shaft , a transporting function of transporting the sample and a positioning function of positioning the target area in an r direction are performed. Also, a drive shaft of a drive means for performing the positioning function for positioning the target area in a direction and the r drive shaft of the r drive means form a dual coaxial shaft assembly.