A new type of goniometer has been designed and constructed for neutron diffraction analyses, and particularly for single‐crystal studies. The neutron detecting system employs a scintillation crystal and photomultiplier, or a miniature high‐pressure BF3counter; and the detector and diffracting crystal are located within a cylindrical shielded region, in such a manner that the moving parts are entirely free of heavy shielding elements. When a miniaturized BF3counter is used, no shielding except B4C in plastic immediately surrounding the counter is required. Rotations are accomplished by servo‐controlled motors, with selsyn indicators coupled to an external servo system. This servo control is designed to permit future introduction of automatic crystal and detector setting. The system is small and inexpensive, and has the particular advantage of readily permitting three‐dimensional diffraction measurements.