The invention relates to a shielding device which is intended to be placed onto the end of a gas-discharge pipe of a heating appliance and which has the purpose of shielding the gas-discharge pipe from rain and wind. To this end, the shielding device comprises a covering member which extends at a distance over a gas-conducting pipe (20). A shielding pipe (10) is arranged coaxially with the gas-conducting pipe (20), between the covering member and the gas-conducting pipe (20). A water-discharge opening (23) is defined between the gas-conducting pipe (20) and the shielding pipe (10). The shielding device further comprises a water-discharge member (30) which is situated between the gas-conducting pipe (20) and the gas-discharge pipe. An annular water-discharge opening (40) is defined between the gas-conducting pipe (20) and the water-discharge member (30). A covering cap (50) extends over the annular opening (40).