An attempt has been made to prepare a new proton conducting solid polymer electrolyte based on PMMA doped with adipic acid (C₆H₁₀O₄) by Solution Casting Technique. The complex admittance plot consists of low frequency arc and high frequency spike. Arrhenius plot analysis shows that the addition of adipic acid to PMMA enhances the ionic conductivity of Pure PMMA solid polymer electrolyte from 5.8040X10^-7Scm^-1 to 1.6732X10^-6 Scm^-1 at ambient temperature. The curves in the Argand plot at different temperatures are incomplete half semicircle suggesting Non - Debye nature of the electrolytes. The long tail in the low frequency range of M’ spectra indicate the capacitive nature of the system.