PURPOSE: To provide a thin shell structure attaching mechanism capable of fastening the thin shell structure with a band having proper tension through the leverage of a stay member, i.e., a portion of an attaching structure member to attach simply, light and surely the thin shell structure for a short time.

CONSTITUTION: A thin shell structure attaching mechanism is provided with a structure composed of a band 4 having engaging parts 4a on both ends, a thin shell support member 2 having a first locking part 2a for locking the engaging part 4a at one end of the band 4 and fixing the end having the first locking pert 2a to a fixing member 1, a stay member 5 provided with a second locking part 5a having a fixed part 5b fixed to a fixing member 1 on one end and locking the engaging part 4a on the other end of the band 4 in the other end so that the second locking part 5a is located on the other end of the support member 2 and connected pivotably to the support member 2 in a position deviated from the center of total length to the second locking part 5a side.