The total X-ray attenuation coefficients in elements Zr, Ag, and In for K α , a n d K β c h a r a c t e r i s t i c l i n e s o f e l e m e n t s w i t h d i f f e r e n t Z ( 3 3 < Z < 9 2 ) were estimated by measuring attenuation in transmission method. The intensity of K X-rays was monitored by a Ge(Li) detector with energy resolution 190 eV at 5.9 keV. The experimentally measured attenuation coefficients were found in good agreement with the theoretical values of attenuation coefficients calculated by Storm, Israel and Hubbell, Seltzer.