Typical neutral-beam injectors for present-day physics experiments are turning to a commercial base and users. The machine parameters of the typical NBI are an acceleration voltage of 20 to 40 kV and a maximum output of 1 MW per beam line with a pulse duration of about 100 ms. Physics experiments using NBI are ongoing in Heliotron (Kyoto University Heliotron Research Center), JIPP-T-11 (IPP, Nagoya University), JFT-2M (JAERI), and GAMMA-10 (Tsukuba University). Positive-ion source NBI for the next generation are almost complete for JT-60 (JAERI) and are now in preparation for the R-Project (IPP, Nagoya University). The machine parameters of the prototype NBI for JT-60 are a 75-to 100-kV acceleration voltage, a 35-A beam current in one ion source, a 1.45MW output per each beam line, and a 10-s pulse duration. A pumping speed of 1.43• 103 m3/sec, a low beam divergence, less than 1 ~ and a high proton ratio, more than 80%, have already been achieved in 100-kV, 10-s operation. A schematic of the prototype NBI for JT-60 is shown in Fig. 1. (1/ For the R-Project at the IPP, Nagoya University, a 10-MW neutral-beam test stand is under construction. The final goal is 120 kV, 75 A, and 1-s beam current at the duty ratio of 1/300. A detailed optimization of ion source is being considered to achieve a beam divergence of less than 1 o. Full-power tests are supposed to commence very soon. The next plan at JAERI is to develop a 200-kV NBI system. Through modification of their old test stand (now called the "Advanced-Injector Test Stand"), which was used for the development of JT-60 NBI, they are going to start preliminary trials on a negative-ion source and direct energy recovery