A latch mechanism for a vehicle door lock device, comprising: a resin body, the body having: an accommodating portion capable of accommodating a latch adapted to be pushed and rotated by a striker attached on the vehicle body side and a pawl engageable with and disengageable from the latch inside thereof; an insertion groove adapted to be that the striker is inserted; a cantilever support portion serving as a part of the insertion groove and adapted to nip the striker with facing inner wall surface of the insertion groove; a receiving portion engageable with a free front end of the cantilever support portion for restricting inclination of the cantilever support portion to a predetermined amount; and a cushion accommodating portion provided on the receiving portion side of the cantilever support portion, the cushion accommodating portion being capable of accommodating a cushion adapted to press the cantilever support portion toward the striker, characterized in that the latch mechanism comprises a support portion for suppressing a deformation of the receiving portion when the free front end of the cantilever support portion engages with the receiving portion and the receiving portion deforms. a resin body, the body having: an accommodating portion capable of accommodating a latch adapted to be pushed and rotated by a striker attached on the vehicle body side and a pawl engageable with and disengageable from the latch inside thereof; an insertion groove adapted to be that the striker is inserted; a cantilever support portion serving as a part of the insertion groove and adapted to nip the striker with facing inner wall surface of the insertion groove; a receiving portion engageable with a free front end of the cantilever support portion for restricting inclination of the cantilever support portion to a predetermined amount; and a cushion accommodating portion provided on the receiving portion side of the cantilever support portion, the cushion accommodating portion being capable of accommodating a cushion adapted to press the cantilever support portion toward the striker, an accommodating portion capable of accommodating a latch adapted to be pushed and rotated by a striker attached on the vehicle body side and a pawl engageable with and disengageable from the latch inside thereof; an insertion groove adapted to be that the striker is inserted; a cantilever support portion serving as a part of the insertion groove and adapted to nip the striker with facing inner wall surface of the insertion groove; a receiving portion engageable with a free front end of the cantilever support portion for restricting inclination of the cantilever support portion to a predetermined amount; and a cushion accommodating portion provided on the receiving portion side of the cantilever support portion, the cushion accommodating portion being capable of accommodating a cushion adapted to press the cantilever support portion toward the striker, characterized in that the latch mechanism comprises a support portion for suppressing a deformation of the receiving portion when the free front end of the cantilever support portion engages with the receiving portion and the receiving portion deforms.