A lung volume-reducing elastic implant (2) and a lung volume-reducing instrument； the lung volume-reducing elastic implant (2) is tubular and comprises a proximal implant end (201), an elastic deformation part (205) and a distal implant end (202)； the elastic deformation part (205) is located between the proximal implant end (201) and the distal implant end (202), and at least the elastic deformation part (205) has shape memory property； the lung volume-reducing elastic implant (2) opens at least at the proximal implant end (201)； the elastic deformation part (205) is provided with a plurality of grooves (204) at intervals in the length direction thereof； each groove (204) communicates with the tube cavity of the elastic deformation part (205)； the lung volume-reducing instrument comprises the lung volume-reducing elastic implant (2) and a conveying device (1) matching same； the conveying device (1) comprises a guidewire (101) and a hollow push piece (110)； the lung volume-reducing elastic implant (2) is detachably connected to the distal end of the hollow push piece (110) via the proximal implant end (201)； and the guidewire (101) passes through the tube cavity of the lung volume-reducing elastic implant (2) and the tube cavity of the hollow push piece (110). The lung volume-reducing instrument is more convenient for an operation and takes shorter time, and avoids damage to the inner wall of a bronchia, reducing the occurrence of pneumothorax.L'invention a pour objet un implant élastique (2) pour la réduction du volume pulmonaire de forme cylindrique et un instrument pour la réduction du volume pulmonaire. L'implant élastique (2) pour la réduction du volume pulmonaire comprend une extrémité proximale (201), une partie élastique déformable (205) et une extrémité distale (202), la partie élastique déformable (205) venant entre l'extrémité proximale (201) et l'extrémité distale (202), la partie élastique déformable (205) au moins présentant une mémoire de forme. L'imp
