Provided is a left atrial appendage occluder, comprising a closure disc (21) and a bracket (12) connected to the closure disc (21)； the closure disc (21) comprises a frame (213, 214)； the frame (213, 214) comprises a proximal-end disc face (2134, 2144) and a distal-end disc face (2135, 2145)； the proximal-end disc face (2134, 2144) comprises a plurality of flexible proximal-end support rods (2137, 2147) arranged radially； the distal-end disc face (2135, 2145) comprises a plurality of flexible distal-end support rods (2139, 2149) arranged radially； the floating end of each of the flexible proximal-end support rods (2137, 2147) is connected to the floating end of the adjacent flexible distal-end support rod (2139, 2149). The flexible proximal-end support rod (2137, 2147) at the point of largest diameter of the closure disc (21) is arranged independent of the distal-end support rod (2139, 2149)； thus the degree of freedom of deformation at the point of largest diameter of the closure disc (21) is increased, ensuring that the outer edge of the closure disc (21) may adapt to fit the openings of various irregular left atrial appendages, achieving optimal fitting and closure effectiveness. At the same time, the flexible proximal-end support rods (2137, 2147) and flexible distal-end support rods (2139, 2149) of the frame (213, 214) are capable of maintaining equivalent supporting forces； thus the tensile force caused by the movement of the left atrial appendage and the movement of the bracket (12) is resisted, preventing long-term leakage and reducing the risks that thrombi will form and a stroke will be caused.L'invention concerne un dispositif d'occlusion de l'appendice auriculaire gauche, comprenant un disque obturateur (21) et un support (12) relié au disque obturateur (21)； le disque obturateur (21) comprend une armature (213, 214)； l'armature (213, 214) comprend une face de disque d'extrémité proximale (2134, 2144) et une face de disque d'extrémité distale (2135, 2145
