A ratchet wrench includes a reception hole defined through the function end of the wrench and a recess is defined in the inner periphery of the reception hole. A ratchet wheel is rotatably located in the reception hole. A pawl, a restriction member and a resilient member are received in the recess. The two ends of the resilient member respectively contact the pawl and the restriction member to bias the pawl to be engaged with the ratchet wheel. A restriction ring is located in the reception hole and has a rod extending therefrom, the rod extends into the recess. The restriction member is located between the rod and the inner periphery of the recess.