A left atrial appendage (LAA) occluder is provided. The LAA occluder includes a sealing disc and an anchoring device, both of which are mutually connected； a part where an LAA cooperates with the anchoring device is an anchoring net, and the anchoring net is of a backboneless structure. The whole anchoring device is of the backboneless structure. The anchoring device is formed by weaving super elastic metal wires or shape memory alloy wires, a distal end of the anchoring device is opened, and a proximal end of the anchoring device is constricted and is connected with the sealing disc to form a conical net. The distal end of the anchoring device is opened and is rolled towards the proximal end to form the anchoring net, and the anchoring net surrounds the conical net. The anchoring net is connected with the conical net through an arc transition area. The LAA occluder provided by the present disclosure can be anchored in the LAA with uniformly distributed force, so that local stress concentration is eliminated, and the LAA occluder can be repeatedly released and can effectively and reliably occlude the opening of the LAA.
