Light elements lighter than to iron are synthesized by nuclear reactions in plasma formed in the cores of fixed stars. These reactions have created large amount of energy resulting in the evolution of stars. Therefore, laboratory experiments for individual astrophysical nuclear-reactions provide one of the keys to understanding the evolution of the universe and nucleosynthesis. The recent development of radio-isotope (RI) beams extends the research field to reactions involving unstable nuclei, which play important roles in explosive events as novae, supernovae, shell burning of neutron stars, primordial nuclear synthesis, and so on.