Abstract: Cydalima perspectalis (Walker, 1859) is an invasive alien species of East Asia origin. In Europe, it was reported for the first time in 2007 in Germany. Following years, the Cydalima perspectalis (Walker, 1859) continued to spread in Germany and nearby countries. The species has now also reached the European side of Istanbul in Turkey. In this research, C. perspectalis distribution and host plants were investigated in Istanbul.