A shearing machine for dismantling large aircrafts suitable for dismantling aircrafts, such as airliners, using a high-strength aluminum alloy or the like can be obtained. As shearing blades of a first jaw portion, the shearing machines includes: a tip blade whose point bites into an object to be sheared; a pair of first parallel shearing blades that are bent at an obtuse angle to the biting direction of the tip blade and disposed both sides of the blade width; and a pair of second parallel shearing blades that are bent at an obtuse angle to an attaching portion of the first parallel shearing blades and disposed on both sides of the blade width. The shearing machine further includes shearing blades of a second jaw portion provided with receiving blades for these shearing blades. As the tip blade, the shearing machine includes: a point blade having an end portion and a pair of tip tapered blades which are disposed on both sides of the end portion and whose blade width is increased toward the rear end; and a pair of tapered blades that are bent at an obtuse angle to an attaching portion of the rear end portion of the tip tapered blades and disposed toward the first parallel shearing blades.
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