Cheiracanthium insulanum (Thorell, 1878) is recorded from Taiwan for the first time. Here, it is re-described based on Taiwanese specimens. It differs from congeners by having remarkably dark chelicerae and dark brown endites and labium. Cheiracanthium adjacensoides Song, Chen et Hou, 1990 from the Mainland China is considered a junior synonymy of C. insulanum.