Abstract: The resection apparatus includes a cutting instrument, e.g., a laser beam, and a unit for suturing the organ being resected, incorporating an oblong die with depressions for staples to bend, an oblong detachable staple body with a staple magazine and a staple ejector. A holder of the staple body has two members and, of which the first member is arranged parallel to the die and is rigidly coupled thereto, whereas the second member is arranged square with the former one, is offset transversely with respect to it and carries a retainer, to lock the staple body in position. Provision is also made in the apparatus for a hold-down frame set on the second member transversely in the plane of movement of the staple body so as encompass, while in one of its positions, the die along the external perimeter thereof for clamping the organ being resected. The first member has guideways for the cutting instrument to set and traverse.