The representative member of group VB TMDCs, NbSe₂ nanoparticles, have attracted significant attention due to their unique structural and optical properties, which make them promising candidates for various applications in nanoelectronics and optoelectronics. In this report, the author reports for the first time the synthesis of NbSe₂ nanoparticles via the sonochemical method at ambient temperature with controlled size, a well defined crystal structure, and desirable optical properties. The investigation of the compositional and structural analysis revealed that the synthesized nanoparticles are well defined, near stoichiometry, with a hexagonal crystal structure belonging to the space group P63_mmc. The other morphological and optical characteristics of synthesized nanoparticles studied through Scanning Electron microscopy (SEM), Transmission Electron microscopy (TEM), Atomic Force Microscopy (AFM), UV-VIS NIR spectroscopy, etc. were discussed here.