The atmospheric gas burner for a decorative fire has a mixing chamber (1) closed on an upper side thereof by a burner mat (2) providing a flame-bearing surface and a pre-mixing burner gas/air supply system (4) connected with the mixing chamber (1) on a bottom side thereof. The pre-mixing burner gas/air supply system has a combustion gas injection nozzle (5) and at least one opening (6) for supplying primary air. In order to provide a gas burner which is compact, creates a realistic flame impression with high flames and has a small input gas energy as well as a low pressure drop, a small blower (8) is arranged in the mixing chamber and has a rotor blade or blades (8) that rotate substantially horizontally in operation.