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A solid electrolyte material consisting of:
Li, M1, M2, and X, wherein
M1 is at least two selected from the group consisting of Ca, Mg, and Zn;
M2 is at least one selected from the group consisting of Y, Gd, and Sm;
X is at least one selected from the group consisting of F, Cl, Br, and I; and
in an X-ray diffraction pattern obtained by X-ray diffraction measurement of the solid electrolyte material using Cu-Kα rays:
there is a first peak in a diffraction angle 2θ range of 30.0° or more and 31.0° or less,
there is a second peak in a diffraction angle 2θ range of 39.0° or more and 40.3° or less,
there is a third peak in a diffraction angle 2θ range of 15.0° or more and 15.7° or less,
there is a fourth peak in a diffraction angle 2θ range of 16.3° or more and 17.1° or less, and
there is a fifth peak in a diffraction angle 2θ0 range of 46.6° or more and 48.1° or less.