A liquid piston thermoacoustic Stirling engine (LPTSE) is a Stirling engine that uses reciprocating motion of liquid columns (water) in U tubes in place of mechanical pistons, for letting the working gas (air) execute the Stirling thermodynamic cycles. This study aims at extracting electric power from the LPTSE using electromagnetic induction. The electromagnetic induction system consists of a permanent magnet installed in a submerged float within the liquid column and a solenoid coil. The electromotive force is induced when reciprocating motion of liquid column occurs inside the solenoid coil along the central axis. The submerged float also plays a role of suppressing the gas-liquid interface instability, which is a loss mechanism inherent to liquid piston engines. Because of its simplicity and use of air and water as the working fluids, we consider that the LPTSE electric generator could be an inexpensive and reliable device that is suitable for small scale electricity generation.