In this study, the removal of diclofenac from drinking water was investigated by using four different coagulants (FeCl3.6H2O, MgCl2.6H2O, Al2(SO4)3.18H2O, FeSO4.7H2O). All of the coagulation experiments were performed by using jar test. After the determination of optimum coagulant dosage and pH, coagulation experiments were performed at four different temperatures to determine the effect of temperature. The highest removal efficiency of diclofenac was obtained as 57.6% with FeSO4.7H2O at pH5. It was determined that the removal efficiency increased with increasing temperature for all coagulation experiments.