Negative active material for rechargeable lithium battery and rechargeable lithium battery including same

Disclosed is a negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same. The negative active material includes crystalline carbon including pores, and amorphous metal nanoparticles dispersed inside the pores, on the surface of the crystalline carbon, or both inside the pores and on the surface of the crystalline carbon, and the conductive nanoparticles have a FWHM of about 0.35 degrees (° ) or more at the highest peak of the crystal planes by X-ray diffraction analysis.