To provide a weightlessness simulation device which can so simulate that an object to be inspected is located in a weightlessness space with a simple configuration.SOLUTION: A weightlessness simulation device 1, which so simulates that an object W to be inspected is located in a weightlessness space, comprises: a link member 12; a support member 21 which so supports the link member as to be rotatable around a first portion 12cA of the link member; a fulcrum 24 which is connected to a second portion of the link member, and to which the object to be inspected is fitted; a weight 27 which is connected to a third portion which is located on a side opposite to the second portion with respect to the first portion of the link member; and a guide part 31 which so guides that the object to be inspected moves along a vertical direction. Moments, which act around the first portion of the link member by the link member, the fulcrum, the weight and the object to be inspected having a prescribed mass or a predetermined mass, are balanced.SELECTED DRAWING: Figure 1
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