A reversible ratchet wrench includes a wrench body, one end of which having a ratchet portion that has an activating opening and a circular hole, and an arc ratchet slot formed therebetween; a control unit having a circular plate portion, one end of which extending to form a handle unit, while the other end of which forming a block unit, and a U-shaped base formed at the top portion of the block unit and a spring is disposed at the U-shaped base; a ratchet unit, one end which having arc teeth, the other end of which having a protruding restricting portion, and a column protrudingly extending from one end of the restricting portion; and a rotating unit disposed at the activating opening of the wrench body, and a teeth ring formed at outer periphery of the rotating unit to engage with the arc teeth of the ratchet unit.