SEAT RAIL LOCKING DEVICE FOR VEHICLE

The present disclosure provides a seat rail locking device for a vehicle, which may apply a method of moving a lock pin (160) in an upward direction to lock a seat rail by moving away from a conventional seat rail locking method of moving the lock pin in a directly downward direction to pass through a floor panel, thereby not causing the interference with the floor panel at all to flexibly apply a battery mounting structure to the floor panel, improving an assembling property as an operator may easily assemble a lock pin guide (150) configured to guide the lock pin (160) to move in upward and downward directions to a movable rail (120) in only an insertion and rotation operation.