Time-controlled pulse plasma CVD has been developed aiming for the mass production of narrow chirality distributed single-walled carbon nanotubes (SWNTs). Through the comparison of continuous plasma CVD and pulse plasma CVD, it is found that the amount of SWNTs can be increased in keeping with the initial narrow chirality distribution by repeating pulse plasma CVD. The effects of pulse time parameter, plasma off time, on the chirality distribution of SWNTs have been also investigated. The chirality distribution becomes narrow with an increase in the plasma off time, then it becomes broad with off time increase. This indicates adjustment of plasma time parameters in pulse plasma CVD can improve the uniformity of chirality distribution, resulting in the mass production of very narrow chirality distributed SWNTs.