PROBLEM TO BE SOLVED: To provide a composition for hair exhibiting hair growth effect, and to provide a melanin production enhancer and a composition for hair exhibiting improvement effect of white hair.SOLUTION: A composition for hair contains Malva sylvestris or Poria cocos (Fr.) Wolf, and caffeine or cacao butter, and exhibits hair growth effect by promoting the proliferation of hair matrix cells. Further, a melanin production enhancer and a composition for hair contain Malva sylvestris, and exhibit improvement effect of white hair by promoting the production of hair stem cell growth factors to proliferate melanocytes.