Solid electrolyte material and battery using same

A solid electrolyte material of the present disclosure includes Li, Zr, and F. A ratio of an amount of substance of Li to an amount of substance of Zr is less than 3.5. In an X-ray diffraction pattern obtained by an X-ray diffraction measurement of the solid electrolyte material using a Cu—Kα ray, a ratio of a value of a full width at half maximum of a peak having a highest intensity within a range of a diffraction angle 2θ from 27.5° to 29.5° to a value of a full width at half maximum of a peak corresponding to a (111) plane of Si in an X-ray diffraction pattern of Si measured under a same condition as in the X-ray diffraction measurement is more than 1.06.