Provided is a left atrial appendage occluder, comprising a closure disc (31), a bracket (33) located on one side of the distal end of the closure disc (31), and a connecting member (32) connecting the closure disc (31) and the bracket (33). The bracket (33) comprises a frame structure； the frame structure comprises a proximal-end side face and a support circumferential surface connected to the proximal-end side face and extending from the proximal-end side face to the distal end. The connecting member (32) is connected to the proximal-end side face. In the left atrial appendage occluder, the bracket (33) is arranged such that one end consisting of at least two support rods (333) is closed, and the other end has an open structure, thus ensuring adequate supporting force for the bracket (33)； at the same time, the support rods (333) have a certain degree of independence with respect to each other； they maintain good adherence to the chamber walls of the left atrial appendage and enhance the stability of the bracket (33) in the left atrial appendage, such that it remains stable inside the left atrial appendage without requiring an anchoring hook, thus preventing damage to the chamber walls of the left atrial appendage.L'invention concerne un dispositif d'occlusion d'appendice auriculaire gauche, comprenant un disque de fermeture (31), un support (33) situé sur un côté de l'extrémité distale du disque de fermeture (31), et un élément de liaison (32) reliant le disque de fermeture (31) et le support (33). Le support (33) comprend une structure de cadre ； la structure de cadre comprend une face latérale d'extrémité proximale et une surface circonférentielle de support reliée à la face latérale d'extrémité proximale et s'étendant de la face latérale d'extrémité proximale à l'extrémité distale. L'élément de liaison (32) est relié à la face latérale d'extrémité proximale. Dans le dispositif d'occlusion d'appendice auriculaire gauche, le support (33) est agencé de telle sorte
