A bendable wrench includes a handle, a head and a pivot. The handle includes a first ear formed thereon, a second ear formed thereon and a plurality of teeth formed on an internal side of the second ear. The head includes an ear and a plurality of teeth formed on an internal side of the ear thereof. The pivot is movably inserted in the ears so as to pivotally connect the head to the handle. The pivot includes a plurality of teeth that can be engaged with the teeth so as to firmly retain the angle between the head and the handle and disengage from the teeth of the head so that the angle between the head and the handle can be changed.