NOVELTY - A negative electrode material comprises silicon oxide particles (A) and carbonaceous particles (B). The ellipticity of the carbonaceous particles (B) is 0.38-0.68, calculated by length (a) and breadth (b) of the particles (B) using specific relation by measuring method. The measuring method involves mixing 10 parts mass or less carbonaceous particles (B) and 100 parts mass binder resin with water or organic-type medium, adding viscosifying material, coating the resultant slurry to an electrical power collector, drying, obtaining active material layer on the electrode and cutting.    USE - Negative electrode material is used for negative electrode for nonaqueous secondary battery (all claimed). Uses include but are not limited to notebook computer, mobile communication device, portable camera, handheld game machine and electric vehicle.    ADVANTAGE - The nonaqueous secondary battery obtained by the negative electrode formed by the negative electrode material has high capacity and excellent cycling characteristics.    DETAILED DESCRIPTION - A negative electrode material comprises silicon oxide particles (A) and carbonaceous particles (B). The ellipticity of the carbonaceous particles (B) is 0.38-0.68, calculated by length (a) and breadth (b) of the particles (B) using specific relation by measuring method. The measuring method involves mixing 10 parts mass or less carbonaceous particles (B) and 100 parts mass binder resin with water or organic-type medium, adding viscosifying material, coating the resultant slurry to an electrical power collector, drying, obtaining active material layer on the electrode having fabric weight of 6-20 mg/cm2, and cutting the obtained electrode by a cross section polisher in a pressed state of the active material layer having density of 1.2-1.8 g/cm3 or unpressed state. Each cross-sectional ellipse of 100 carbonaceous particles is in ellipsoid, calculated by image of the electrode crosssection image with a scanning electron microscope using image analysis software. The length of each major axis and length of minor axis are measured from each cross-sectional ellipsoid. INDEPENDENT CLAIMS are included for the following:    (1) negative electrode; and    (2) nonaqueous secondary battery.