An experimental method determining the device angular resolution has been proposed to found out an accuracy in measuring angles in the process of nuclear scattering. The method has been tested at the device designed for the measuring of full and differential cross-sections of particle nucleus interaction. The device consists from 2 multiwire chambers and scintillation counters. The device has been irradiated with the muon beam. The obtained results permitted to find errors in coordinate determination with proportional chambers and to check up experimentally the validity of the calculation of multiple scattering according to the Monte Carlo method. Chernyshev,-V.P.; Bysheva,-G.K.; Vajsenberg,-A.O.; Gol'din,-L.L.; Semenov,-A.V.; Tumanov,-G.K.
