A solid battery that includes a positive electrode terminal, a negative electrode terminal spaced apart from the positive electrode terminal, a positive electrode layer electrically connected to the positive electrode terminal, a negative electrode layer electrically connected to the negative electrode terminal, a first solid electrolyte layer between the positive electrode layer and the negative electrode layer and containing a first solid electrolyte, and a second solid electrolyte layer between the positive electrode layer and the negative electrode terminal or between the negative electrode layer and the positive electrode terminal, and containing a second solid electrolyte having a glass transition temperature lower than a crystallization temperature of the first solid electrolyte and having a crystallization temperature equal to or higher than a glass transition temperature of the first solid electrolyte, and the second solid electrolyte layer having an ion conductivity lower than that of the first solid electrolyte layer.