Melting in iron has been detected in shock wave experiments. Release wave velocities are determined using the overtaking rarefaction technique. Upon melting the shear modulus becomes zero leading to a decrease in the acoustic wave velocity behind the shock front. Two velocity discontinuities have been detected: (1) 200¿2 GPa at a calculated temperature of about 5500--6000K. The evidence indicates that the &egr;-&ugr; transition occurs at 200 GPa and that &ugr; iron melts near 250 GPa along the iron Hugoniot.