To provide a composition against skin aging by prevention of the decrease of skin thickness.

The composition is prepared by containing at least one active substance for a nutritional function of cutaneous nerve and/or one nerve stimulator and/or one nerve activating chemical and/or one nerve mediator in a suitable carrier. The active substance for the nutritional function of cutaneous nerve is preferably active to skin sensory nerve including a growth factor, PEG and GAG, etc. The nerve stimulator and nerve activating chemical include capsaicinoids such as capsicosides, capsidiols and capsaxanthin and capsaicin, or a plant extract such as paprika, red hot pepper or pepper, and the nerve mediators include such as substance P, VIP, CGRP, a nerve peptide Y, GRP and acetylcholine.