CHILD SEAT LOCK DEVICE

The child seat lock device according to the present invention has: an anchor that is secured to a vehicle body frame and retains a catch of a child seat in a removable manner; and a seat cushion that is attached to the vehicle body frame independently of the anchor. The seat cushion has: a cushion pad that is provided with a groove portion that houses the catch retained by the anchor and extends in a front-rear direction of the seat; a skin for covering the cushion pad and having, at a location in front of the groove portion, an insertion slit into which the catch is inserted; and a guide portion for guiding the inserted catch from the insertion slit toward the anchor at the position of the groove portion, the guide portion being harder than the cushion pad.