Abstract: A ratchet wrench is provided with an angle adjusting device having drive head, a handle, and a button. The drive head is provided at one end thereof with a pivoting end. The handle is provided at one end thereof with two pivoting lugs for fastening the pivoting end of the drive head. The handle is further provided at one end thereof with a receiving slot for receiving the button in conjunction with a spring and a steel ball. The button is provided with an eccentric slot for receiving the spring, a notch corresponding in location to the ball-locating slots of the pivoting end of the drive head, and an inclined plane. The button is urged by the spring such that the steel ball is forced by the inclined plane of the button to locate in one of the ball-locating slots of the pivoting end of the drive head. As the button is pressed, the steel ball is located in the notch of the button to enable the drive head to be adjusted angularly in relation to the handle.