SLIDING DOOR DEVICE FOR VEHICLE

A sliding door device for a vehicle includes: a door configured to open or close a door opening portion formed in a vehicle body; a lower arm including one end portion connected to an internal side of the door, and the other end portion configured to slide along a rail provided on the vehicle body; a lower arm carrier rotatably connected to the other end portion of the lower arm and configured to slide the lower arm while moving along a rail provided on the vehicle body; a lower arm rotor rotatably provided on the lower arm carrier and including one end portion connected to the lower arm so that the lower arm rotates; a catch configured to fix the door by engaging with the lower arm rotor after the door slides; and a pawl with which the catch engages by rotating so that a rotation of the catch is fixed.