Effects of light for different cultivation processes on fruit-body production of Pholiota nameko was examined. (1) Light treatment for "Baiyo" (spawn running) process at low intensity slightly increased the yield of fruit-bodies. However, many primordia were induced during "Baiyou" process by this light treatment. (2) If the cultures followed by "Kinkaki" (scraping off the old surface mycelia in bottle substrate) treatment were incubated in darkness during "Medashi" process for the induction of fruiting, the formation of primordia was delayed as compared to that of the cultures exposed to light, and tiny buds with rudimental pilei were formed in these cultures. The optimal light intensities for producing the maximum number of buds and the highest yield of fruit-bodies were 2 lux and 10 lux, respectively. (3) The light treatment given at "Seiiku" process (growing up) enhanced fruit-body development, and the optimum intensity for producing the highest yield was estimated to be around 30 lux. The supra-optimum lighting might cause the delay of fruit-body development. The optimal values for the development of stipe and pieus were around 10 lux. The higher light intensities given at this process produced the dark brown colored fruit-bodies.