by the parking pole shaft 62 and a return spring 64 biasing the parking pole 63 to a non parking side in fig3 when the shift lever 41 arrives at the entrance of the parking gate 44 the parking pole 63 is rotated against the return spring 64 shown in fig4 so that a pawl 65 meshes with the parking gear 61 as a result of this operation a first parking state is acquired in the parking state the rotation of the propeller shaft 14 connected to the transmission 12 is also regulated and hence the propeller shaft 14 is brought into a locked state as shown in fig2 a torsion spring 67 is mounted around the second support pin 54 and the torsion spring 67 biases the shift lever 41 in the direction in which the shift lever 41 is separated from the corner 43 that is due to a biasing action of the torsion spring 67 the shift lever 41 is pushed to a deep portion of any one of the following the low speed forward gate 48 the high speed forward gate 47 the neutral gate 46 the reverse gate 45 and the parking gate 44 shown in fig3 next the manner of operation of the parking gate 44 is explained fig5 shows a state where the shift lever 41 is at the corner.