A snow chamber (100) comprises a snow making apparatus having means (10) for generating a cold air current (F), a duct (20) for channelling the cold air current (F) towards an outlet mouth (21), at least one nozzle (30) designed to deliver a nebulized jet of water under pressure into the cold air current (F) in order to start the snow forming process in the cold air current (F), a build-up element (40) facing the outlet mouth (21) to receive and accumulate from the outlet mouth (21) a flow of snow being formed and at least one distributor (50) associated with the build-up element (40) and configured to remove a part of the snow which accumulates on the build-up element (40) and to direct that part of the snow build-up towards a distribution zone (D) below.