Abstract: The delivery device includes: a first outer tube member; an inner tube member that is inserted into the first outer tube member; a second outer tube member that is positioned at a proximal side with respect to the first outer tube member and is connected to the inner tube member; a pulling member that is inserted into the second outer tube member and is connected to the first outer tube member; a first joint member in which a first hole for fixing the pulling member therein and a second hole configured to allow the inner tube member to advance and retract are formed; and a fixing member that fixes the first joint member to the first outer tube member.

Abstract: A delivery device includes a handle, a first sheath having a proximal end portion connected to the handle, a second sheath through which the first sheath is inserted, the second sheath translatable relative to the handle in a longitudinal direction of the delivery device, a third sheath through which the second sheath is inserted and a length adjustment mechanism. A distance in the longitudinal direction of the delivery device between a proximal end of the first sheath and a distal end of the third sheath defines a separation distance. The length adjustment mechanism adjusts the separation distance between a first length and a second length. The second length is longer than the first length.

Abstract: The stent delivery system includes: an outer tube in which a first opening is formed in a distal end and a second opening is formed between the distal end and a proximal end; an inner tube inserted into the outer tube from the first opening to the second opening, and disposed outside of the outer tube from the second opening to the proximal end of the outer tube; and a stent stored between the inner tube and the outer tube. The outer tube and the inner tube are configured to be inserted into a channel of an endoscope. The second opening is formed at a position where the second opening is arranged inside the channel when a storage position is protruded from a distal end side of the channel.

Abstract: A stent delivery system includes: a first outer tube; a second outer tube disposed at a proximal side from the first outer tube; an inner tube connected to a distal end part of the second outer tube and configured to be inserted into the first outer tube; a traction member connected to a proximal end part of the first outer tube and configured to be inserted into the second outer tube; and a stent housed between the inner tube and the first outer tube. The surface roughness of an outer surface of the second outer tube is higher than the surface roughness of an outer surface of the first outer tube.