A reversing device for a ratchet wrench comprises a body of the ratchet wrench, a ratchet wheel, a left engaging member, a right engaging member, a left spring, a right spring, a control member, and a control cover. Both of the left and right engaging members, when subjected to a force, will not be in contact with the control member, so that, the problem that the left or right engaging member, when subjected to a force, will push the control member to reversely rotate and cause slippage, can be solved.