The modulus Spectroscopy of Lead Potassium Titanium Niobate (Pb0.95K0.1Ti0.25Nb1.8O6, PKTN) Ceramics was investigated in the frequency range from 45 Hz to 5 MHz and the temperature, from 30 to 600 degrees C. XRD analysis in PKTN indicated a orthorhombic structure with lattice parameters a = 18.0809 angstrom, b = 18.1909 angstrom and c = 3.6002 angstrom. The dielectric anomaly with a peak was observed at 510 degrees C. Variation of epsilon(1) and epsilon(11) with frequency at different temperatures exhibit high values, which reflects the effect of space charge polarization and/or conduction ion motion. The electrical relaxation in ionically conducting PKTN ceramic analyzed in terms of Impedance and Modulus formalism. The Cole-Cole plots of impedance were drawn at different temperatures. The dielectric modulus, which describes the dielectric relaxation behaviour is fitted to the Kohlrausch exponential function. Near the phase transition temperature, a stretched exponential parameter beta indicating the degree of distribution of the relaxation time has a small value. From the AC conductivity measurements the activation energy near phase transition temperature (T-C degrees C) has been found to different from that of the above and below T-C The temperature dependence of electrical modulus has been studied and results are discussed.