A transmission apparatus for a vehicle includes a shift lever in which a cover is movably disposed. The transmission apparatus, which performs a gear shift according to a gear shift command received by the shift lever, includes a bottom portion capable of moving linearly so that gear shift stages including a first gear shift stage and a plurality of second gear shift stages are mutually shifted, a body rotatably coupled to an upper side of the bottom portion so that the plurality of second gear shift stages are mutually shifted, and a cover movably disposed on an upper end of the body so that a position of the cover is varied according to the mutual shift of the gear shift stages.