Liquid crystalline elastomers have been paid increasing attention as ideal materials for the investigation of piezoelectric and inverse-piezoelectric effects, because the polymer network prevents macroscopic flow, which disturbs the emergence of piezoelectricity in conventional low-molar-mass liquid crystals [1-5]. In this report, we focus on the chiral smectic A (SmA*) phase in which the electroclinic effect, namely the direct coupling of molecular tilt to the applied electric field, is expected.  Mechanical response to electric stimulation in a side-chain SmA* elastomer is investigated.