Vehicle seat with walk-in mechanism

The purpose of the present invention is to provide, in a vehicle seat having a walk-in mechanism, a locking mechanism for a seat back with which rotation of a lock plate can be suppressed against impact in any direction, and with which the locked state can be more reliably retained. In order to achieve the foregoing, provided is a vehicle seat having a walk-in mechanism, wherein: a reclining unit having the walk-in mechanism comprises a swing plate and latch for locking a seat back at a seated posture position; the latch has a structure that rotates about a latch rotating shaft, locks rotation of the seat back by meshed engagement with the swing plate, and releases the lock when the meshed engagement with the swing plate comes out; and the latch is given a structure with which a counter plate is added to the opposite side from the position of meshed engagement with the swing plate, relative to the latch rotating shaft, and the center-of-gravity position of the latch is brought close to the center of rotation of the latch.