A pair of circlip pliers includes two handles, two jaws and two switching boards. The handles are symmetrical to a longitudinal axis and are arranged at a horizontal interval. The jaws are symmetrical in shape, are mounted between the handles, abut each other, and are pivotally connected with the handles. The switching boards are respectively and pivotally connected with the handles. The pair of circlip pliers can be applied as an expanding type circlip plier or a squeezing type circlip plier to allow a user to change the state of the pair of circlip pliers for different purposes.