In this report, we discuss about the preparation of a metal-polymer hybrid system (poly-aminosalicylic acid encapsulated copper nanoparticles) using an in-situ method, where the copper sulphate and aminosalicylic acid were used as the precursors for the metal and the polymer, respectively. The composite system was used as an active material for a device to demonstrate the electrical property. The system exhibited a nonvolatile switchable resistive behaviour with a constant ON-OFF current ratio of 2 x 10(3). The current-voltage behaviour of the metal-polymer based device was followed by the Poole-Frenkel emission and ohmic conduction mechanism.