Abstract: A holding device includes: a first suction structure that sucks a main member; and a first grasping structure that is arranged adjacent to the first suction structure in a direction intersecting with a first direction and grasps a first auxiliary member. The first suction structure is directed so as to suck the main member located in the first direction, and the first grasping structure is directed so as to grasp the first auxiliary member located in the first direction.

Abstract: A holding device that holds a plate-shaped member having flexibility includes: a first suction structure that sucks the plate-shaped member; a second suction structure that sucks the plate-shaped member and is turnable and movable; a turning device that turns the second suction structure and a moving device that moves the second suction structure. When the first suction structure and the second suction structure suck and hold the plate-shaped member, the turning device twists the plate-shaped member by turning the second suction structure such that the second suction structure is directed in a direction different from the first suction structure, and the moving device bends the plate-shaped member by moving the second suction structure such that the second suction structure retreats relative to a direction along which the first suction structure and the second suction structure are located.

Abstract: A holding device according to the present invention is a holding device that holds a workpiece having flexibility. A controller sets the workpiece to a reference state in such a manner that with first and second holding mechanisms holding the workpiece, a moving mechanism moves at least one of the first and second holding mechanisms in a length direction based on a length, detected by a detector, of the workpiece in a held state and a length, prestored in a storage, of the workpiece in a reference state.