A performance testing apparatus for a wave height measurement device according to an embodiment of the present invention includes: a first body to which a plurality of first support parts of the wave height measurement instrument for measuring the wave height of a model ship installed in a towing tank are attached; a second body to which a plurality of second supports of the wave height meter corresponding to the first support are attached and spaced apart from the first body; a connecting post connecting the first body and the second body; And a gap adjuster connected to the connection pillar and adjusting the distance between the first body and the second body to adjust the lengths of the plurality of measurement lines connecting the plurality of first support parts and the plurality of second support parts; include
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