NOVELTY - An electrode material consists of composite particles containing material (A) containing lithium and element which is alloyed, and electroconductive material (B). The amount of material (A) in the composite particles is 30-80 mass% with respect to total amount of the composite particle. The composite particles have voids. Volume of voids occupation rate (Vs) of composite particles is 35-70%, and given by specific relation.    USE - For cathode of nonaqueous secondary battery (claimed) such as coin-shaped, button-type, sheet-type, laminated-type, cylindrical-shape, flat-type and square-shape nonaqueous secondary batteries, used for electric vehicles.    ADVANTAGE - The nonaqueous secondary battery using the electrode material, has excellent capacitance, durability and charging-and-discharging cycle characteristics.    DETAILED DESCRIPTION - An electrode material consists of composite particles containing material (A) containing lithium and element which is alloyed, and electroconductive material (B). The amount of material (A) in the composite particles is 30-80 mass% with respect to total amount of the composite particle. The composite particles have voids. Volume of voids occupation rate (Vs) of composite particles is 35-70%, and given by the following relation: Vs = (1-1.35xD1/D2)x100, where D1 (in g/cm3) is bulk density of composite particles, and D2 (in g/cm3) is true density of composite particles. INDEPENDENT CLAIMS are included for the following: (i) manufacture of the electrode material, which involves forming composite particles by mixing and granulating material (A) containing lithium and element which is alloyed, electroconductive material (B) and resin, and forming void in composite particles by heating the particles, burning or sublimating the resin, and removing the resin; (ii) nonaqueous secondary battery, which is equipped with a cathode containing the electrode material, an anode and nonaqueous electrolyte; and (iii) manufacture of the nonaqueous secondary battery, which involves forming alloy (a1) of lithium and silicon as element which is alloyed contained in the electrode material, by controlling charge. Alloy (a1) is of formula: LixSi.    x=integer less than or equal to 2.625.    DESCRIPTION OF DRAWING(S) - The figure shows the sectional drawing of the composite particles covered with the material containing carbon, of the time of charging and discharging process. (Drawing includes non-English language text).