Negative electrode active material for rechargeable lithium battery, negative electrode including the same and method of preparing the same, and rechargeable lithium battery including the same

Provided are a negative electrode active material for a rechargeable lithium battery, which includes a first silicon oxide and a second silicon oxide with a particle diameter differing from the one of the first silicon oxide, a negative electrode including the negative electrode active material, and a method of manufacturing the negative electrode, and a rechargeable lithium battery including the negative electrode.