Provided is a left atrial appendage occluder, comprising a closure disc (31), a bracket (33, 43) located on one side of the closure disc (31), and a connecting member (32) connecting the closure disc (31) and the bracket (33, 43)； the bracket (33, 43) comprises a first fixing connection member (334, 434), a second fixing connection member (333, 433), and a plurality of support rods (331, 431)； the first ends of the plurality of support rods (331, 431) are collapsed and secured by the first fixing connection member (334, 434)； the second ends of the plurality of support rods (331, 431) are collapsed and secured by the second fixing connection member (333, 433)； a connecting member (32) is connected to the first fixing connection member (334, 434). The bracket (33, 43) is arranged such that the two ends constituted by at least two support rods (331, 431) have a closed structure, thus increasing the area of contact between the outer surface of the bracket (33, 43) and the left atrial appendage (2). After the bracket (33, 43) is placed at a suitable position in the left atrial appendage (2), it is compressed and its support rods (331, 431) provide strong supporting force to the left atrial appendage (2), and stable deployment is ensured； it is possible to secure the bracket in the left atrial appendage (2) without needing to arrange an anchoring hook (332, 432), thus preventing damage to the chamber wall (3) of the left atrial appendage (2).La présente invention concerne un dispositif d'occlusion d'appendice auriculaire gauche, comprenant un disque de fermeture (31), un support (33, 43) situé sur un côté du disque de fermeture (31), et un élément de liaison (32) reliant le disque de fermeture (31) et le support (33, 43)； le support (33, 43) comprend un premier élément (334, 434) de liaison de fixation, un second élément (333, 433) de liaison de fixation, et une pluralité de tiges (331, 431) de support； les premières extrémités de la pluralité de tiges (331, 431) de supp
