A novel piezo- and pyro-electric elastomer electret was prepared using polar amorphous polynorbornene (PNBE) as the electroactive filler in a polydimethylsiloxane (PDMS) matrix. Under the influence of an electric field, the composite was heated above the glass transition of the filler and subsequently cooled back to room temperature (RT), thereby freezing the oriented dipoles. The resultant composites with 30 wt.% of PNBE showed a high piezoelectric d31 coefficient of 37 pC/N and a quasi-static pyroelectric coefficient of 0.54 μC/m2K.