Trifluoromethyl group is one of the important groups in medicinal chemistry. In 2010, Yu and Sanford reported the Pd-catalyzed aromatic C-H bond trifluoromethylation with the aid of directing groups. With these reports as a turning point, the studies on this field have been developed in a couple of years. This review describes the recent advances in aromatic C-H bond trifluoromethylation catalyzed/mediated by transition metal reagents.