It is an object of the present invention to provide a deformable thin object spreading device capable of spreading a deformable thin object with a simple structure. In the deformable thin object spreading device of the present invention, a control part is configured to: control a clamping unit and a moving mechanism to cause the clamping unit to clamp a first point of a deformable thin object (S1); cause an end point detecting part to detect an end point (S3); control the clamping unit and the moving mechanism to cause the clamping unit to clamp the end point detected in S3 (a first end point) of the deformable thin object (S4); cause the end point detecting part to detect an end point (S6); control the clamping unit and the moving mechanism to cause the clamping unit to clamp both of "the first end point" and "the end point detected in S6 (a second end point) " of the deformable thin object (S7); cause the end point detecting part to detect an end point (S9); and control the clamping unit and the moving mechanism to cause the clamping unit to clamp both of "the first end point or the second end point" and "the end point detected in S9" of the deformable thin object (S10).
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