A separation device comprising: a first shredding unit that shreds a processing target containing a first material and a second material adhering to the first material; a first separation unit that has a first tubular portion in which first holes that allow the second material contained in the processing target shredded by the first shredding unit to pass through without allowing the first material to pass through are formed, and that separates the second material passing through the first holes from the processing target by rotating the first tubular portion in a state in which the processing target shredded by the first shredding unit is accommodated in the first tubular portion; and a first air pipe for transferring the processing target shredded by the first shredding unit to the first separation unit with air pressure, wherein the first air pipe has a first portion that extends in a first direction and a second portion that is connected to the first portion on a downstream side of the first portion and that extends in a second direction substantially orthogonal to the first direction, and wherein the first separation unit includes inside the first tubular portion: a first rotating rod that has a central axis coinciding with a central axis of the first tubular portion and is provided so as to be rotatable about the central axis of the first rotating rod, the separating device being characterized in that the first separation unit further comprises a first screw member that is helically provided around the first rotating rod and has a plurality of teeth formed in the first screw member. a first shredding unit that shreds a processing target containing a first material and a second material adhering to the first material; a first separation unit that has a first tubular portion in which first holes that allow the second material contained in the processing target shredded by the first shredding unit to pass through without allowing the first material to pass through are formed, and that separates the second material passing through the first holes from the processing target by rotating the first tubular portion in a state in which the processing target shredded by the first shredding unit is accommodated in the first tubular portion; and a first air pipe for transferring the processing target shredded by the first shredding unit to the first separation unit with air pressure, wherein the first air pipe has a first portion that extends in a first direction and a second portion that is connected to the first portion on a downstream side of the first portion and that extends in a second direction substantially orthogonal to the first direction, and wherein the first separation unit includes inside the first tubular portion: a first rotating rod that has a central axis coinciding with a central axis of the first tubular portion and is provided so as to be rotatable about the central axis of the first rotating rod, the separating device being characterized in that the first separation unit further comprises a first screw member that is helically provided around the first rotating rod and has a plurality of teeth formed in the first screw member. a first rotating rod that has a central axis coinciding with a central axis of the first tubular portion and is provided so as to be rotatable about the central axis of the first rotating rod, the separating device being characterized in that the first separation unit further comprises a first screw member that is helically provided around the first rotating rod and has a plurality of teeth formed in the first screw member.