A negative electrode active material includes a carbon material; a plurality of first particles including a first silicon oxide particle and a carbon layer and a plurality of second particles including a carbon particle and a second silicon oxide particle, and when a first mass of the first silicon oxide particle per gram of the negative electrode active material is referred to as M1 gram, and a second mass of the second silicon oxide particle per gram of the negative electrode active material is referred to as M2 grams, 0.40≤M1/(M1+M2)≤0.85 is satisfied, and when a first discharge capacity associated with the carbon material and the carbon particle is referred to as CpC, and a second discharge capacity associated with the first silicon oxide particle and the second silicon oxide particle is referred to as CpSO, 0.15≤CpSO/(CpC+CpSO)≤0.5 is satisfied.