The present invention relates to an anti-aging or antioxidant composition which contains, as an active ingredient, a plant stem cell line derived from the cambium of Panax ginseng, including wild ginseng and ginseng, or an extract thereof, a lysate thereof and a culture thereof. The composition has minimized side effects compared to existing anti-aging agents and antioxidants, and thus is safe for the skin. Also, the composition of the present invention shows an antioxidant effect of inhibiting reactive oxygen species caused by exposure to UV radiation that is the major cause of skin aging, and it can effectively reduce or inhibit aging-related factors. Thus, the composition is useful for the prevention and inhibition of aging.