A washer plasma gun for alkali‐metal plasma is developed. This gun is suitable as a source for experiments on alkali‐metal plasmas, plasma diagnostics, and in various applications such as ion‐beam sputter deposition. The gun uses an injector of alkali‐metal vapor based on the principles of laser ablation. Acceleration is performed by a large electrical field provided across eight washers. The gun is compact, stable, and easy to fabricate and use. The gun produces a neutral Li0beam current of 1 A/cm2and a Li+ion current of 50 A/cm2at its exit at 10 kV of capacitor bank voltage. With this intensity, it is possible to produce beams of neutral Li0atoms of density 6×109cm−3and Li+ions of density ∼1011cm−3at 1 m from the gun, moving with a velocity of ∼107cm/s.