The construction of XeCl laser excited by e-beam is described and its radiation parameters are presented. Laser distinguishes from others lasers having similar radiation energy by the small weight and dimensions. Laser excitation fulfills the electron accelerator on base Marx generator with vacuum isolation. The experiments were performed using a gas mixture of Ar-Xe-HCl with pressure of 2-3 bar. A plane-plane lasers optical cavity was used. 120 J output with optical pulse duration ~250 ns (FWHM) on a wavelength of 308 nm have been extracted from 25 cm laser aperture. The heterogeneity of laser intensity distribution was within the limits of 10%.