This paper reports one new record of a megascolecid earthworm from Taiwan: Amynthas masatakae (Beddard, 1892), which was collected from Dong-Yan Mt. Previously, A. masatakae was only known from Japan. To now in Taiwan, this species has only been recorded in a small area of Dong-Yan Mt. in northern Taiwan, so little is known about its ecological data here. The external and internal characters of A. masatakea are described in this paper.