Abstract  We consider the shape of electron bubbles in liquid helium. Grinfeld and Kojima (Phys. Rev. Lett. 91, 105301, 2003) have shown that the in a certain pressure range the 2S electron bubble is unstable against small distortions with l=3 and loses its spherical symmetry. We report more detailed calculations of this effect and also study the behavior of the 3S and 2P bubbles.