A walk-in seat having: a seat having a seat cushion for supporting a hip of a sitter, and a seatback provided in a tiltable manner with respect to the seat cushion to support the back of the sitter; a first seat track including a first lower rail provided on a floor side, and a first upper rail being movably engaged with the first lower rail and being provided with the seat cushion of the seat thereon; a second seat track provided parallel to the first seat track, the second seat track including a second lower rail provided on the floor side, and a second upper rail being movably engaged with the second lower rail and being provided with the seat cushion of the seat thereon; a first locking mechanism provided on the first seat track to prohibit movement of the first upper rail with respect to the first lower rail; a first control lever rotatably provided on the first upper rail to unlock the first locking mechanism; a second locking mechanism provided on the second seat track to prohibit movement of the second upper rail with respect to the second lower rail; a second control lever rotatably provided on the second upper rail to unlock the second locking mechanism; a memory mechanism provided on the first seat track, the memory mechanism holding the first control lever such that when the first upper rail is located between a middle position and a foremost position with the seatback being tilted most forward, the first locking mechanism is unlocked; and first cable means latched on the seatback at one end, and latched on the first control lever at the other end, the first cable means arranged to operate such that when the seatback of the seat is tilted to a most forward position, the first cable means drives the first control lever to unlock the first locking mechanism; characterized in that second cable means is latched on the first control lever at one end, and latched on the second control lever at the other end, the second cable means arranged to transmit operation of the first control lever to the second control lever, that a continuous single cable is provided, the cable being latched on the seatback at one end, latched on the first control lever at a middle portion, and latched on the second control lever at the other end, and that a portion of the cable from the seatback to the first control lever is formed as the first cable means, and a portion of the cable from the first control lever to the second control lever is formed as the second cable means. a seat having a seat cushion for supporting a hip of a sitter, and a seatback provided in a tiltable manner with respect to the seat cushion to support the back of the sitter; a first seat track including a first lower rail provided on a floor side, and a first upper rail being movably engaged with the first lower rail and being provided with the seat cushion of the seat thereon; a second seat track provided parallel to the first seat track, the second seat track including a second lower rail provided on the floor side, and a second upper rail being movably engaged with the second lower rail and being provided with the seat cushion of the seat thereon; a first locking mechanism provided on the first seat track to prohibit movement of the first upper rail with respect to the first lower rail; a first control lever rotatably provided on the first upper rail to unlock the first locking mechanism; a second locking mechanism provided on the second seat track to prohibit movement of the second upper rail with respect to the second lower rail; a second control lever rotatably provided on the second upper rail to unlock the second locking mechanism; a memory mechanism provided on the first seat track, the memory mechanism holding the first control lever such that when the first upper rail is located between a middle position and a foremost position with the seatback being tilted most forward, the first locking mechanism is unlocked; and first cable means latched on the seatback at one end, and latched on the first control lever at the other end, the first cable means arranged to operate such that when the seatback of the seat is tilted to a most forward position, the first cable means drives the first control lever to unlock the first locking mechanism; characterized in that second cable means is latched on the first control lever at one end, and latched on the second control lever at the other end, the second cable means arranged to transmit operation of the first control lever to the second control lever, that a continuous single cable is provided, the cable being latched on the seatback at one end, latched on the first control lever at a middle portion, and latched on the second control lever at the other end, and that a portion of the cable from the seatback to the first control lever is formed as the first cable means, and a portion of the cable from the first control lever to the second control lever is formed as the second cable means.