Abstract: Ni-based superalloys are one of the most important materials employed in high-temperature applications within the aerospace and nuclear energy industries and in gas turbines due to their excellent corrosion, radiation, fatigue resistance, and high-temperature strength. Linear friction welding (LFW) is a new joining technology with near-net-forming characteristics that can be used for the manufacture and repair of a wide range of aerospace components. This paper reviews published works on LFW of Ni-based superalloys with the aim of understanding the characteristics of frictional heat generation and extrusion deformation, microstructures, mechanical properties, flash morphology, residual stresses, creep, and fatigue of Ni-based superalloy weldments produced with LFW to enable future optimum utilization of the LFW process.