Problem: to provide an activating agent and a collagen production enhancer, each of which has excellent activating effect and anti-aging effect on cells and has safety that is sufficient to withstand usage for a long period of time; and a cosmetic, a quasi-pharmaceutical product, a pharmaceutical product, a food and a drink, each of which contains the activating agent or the collagen production enhancer as an active ingredient. Solution: a cell activation agent which is characterized by containing a cellobiose lipid that is a kind of a glycolipid-type biosurfactant.