<p>This study presents basic data on temperature dependence of mechanical properties of GFRP materials. First, coupon specimens are collected from GFRP plates by hand lay-up molding. Then, material tests are conducted under different temperature environments to clarify the relationship between temperature and tensile properties. In order to receive repeated temperature histories in the actual environment, a tensile test was also performed on the cooled material after heating. As a result, it was found that the tensile performance of GFRP decreases as the temperature of the specimen increases. It was also found that the specimens that had undergone the cooling process after heating had the same tensile performance as the initial state.</p>