The present invention relates to a composition for improving scalp condition and/or promoting hair restoration containing soyasaponin or a derivative thereof, which can be widely used as an external skin preparation for improving scalp condition and/or promoting hair growth and hair restoration, a cosmetic composition or a pharmaceutical composition, as the composition has high stability for skin without side effects, improves a scalp condition, and is effective in promoting hair growth and/or preventing hair loss by activating stem cells.