Abstract: The electrode material according to one aspect of the present disclosure includes a first active material particle, a second active material particle, and a solid electrolyte. The first active material particle and the second active material particle each include Li, Ti, and O. The ratio of the average particle size of the second active material particle to the average particle size of the first active material particle is greater than or equal to 1.5 and less than or equal to 6.0. The battery according to one aspect of the present disclosure includes a positive electrode, a negative electrode, and an electrolyte layer located between the positive electrode and the negative electrode. At least one selected from the group consisting of the positive electrode and the negative electrode includes the electrode material.