SEAT RAIL LOCKING DEVICE

The present disclosure relates to a seat rail locking device that fixes a seat after the seat has moved in a fore and aft direction of a vehicle. The seat rail locking device includes a guide bracket provided in the moving rail, a pair of locking units supported by the guide bracket, configured to move in an upward and downward direction, and arranged in the longitudinal direction, each locking unit comprising a plurality of locks selectively engaged with the fixing locks, and a fixing bracket configured to fix the locking unit to the moving rail. With this configuration, it is possible to prevent a play between the locks and the fixing locks from occurring at locations where the locks of the lock unit provided in the moving rail are engaged with and locked to the fixing locks provided in the fixed rail. Further, it is possible to prevent BSR noise and damage to parts from occurring.