Breathing equipment at least employable for use in anaesthesiology procedure comprising: a breathing bag providing for the discharging of exhaled gas, a gas-guiding conduit extending between a breathing piece and the breathing bag and via which gas is inhaled and exhaled by a patient during use of the equipment, and a supply conduit via which inhalation gas in the form of air or oxygen and, where applicable, agent is introduced for inhalation by such patient via the breathing piece; wherein the breathing bag is a flexible bag for manually aiding in the breathing process of a patient during use of the equipment by manual compression and relaxation, and wherein provision is made for the discharging of exhaled gas via a gas removal conduit extending from the breathing bag while being at least couplable to extend to a location of final discharging adequately removed from a location of use of the equipment, once so ready for use, to limit the possibility of exhaled gas contamination of its zone of use, wherein at least part of the gas removal conduit is in the form of an exhaust conduit branching laterally from the gas guiding conduit at a location remote from the breathing piece though gas flow fashion interconnected to discharge exhaled gas that has been exposed to the action of the breathing bag once the equipment is in use along the gas-guiding conduit, as thus accommodating such flow of exhaled gas, and the gas removal conduit in providing conventional conditions of breathing assistance during use of the equipment, characterized in that the breathing bag is conventionally shaped with the gas removal conduit extending from a distal and discharge end (12.2) of the bag as regards its gas guiding conduit connected end (12.1), and in that the gas removal conduit returns in snug adjacent relationship with the breathing bag from its distal end (12.2) by way of an exhaust air discharge bridging conduit forming part of the gas removal conduit to the position of branching of the exhaust conduit from the gas guiding conduit, thereby contributing to facilitate the use of the equipment under conventional conditions of breathing assistance use. a breathing bag providing for the discharging of exhaled gas, a gas-guiding conduit extending between a breathing piece and the breathing bag and via which gas is inhaled and exhaled by a patient during use of the equipment, and a supply conduit via which inhalation gas in the form of air or oxygen and, where applicable, agent is introduced for inhalation by such patient via the breathing piece; wherein the breathing bag is a flexible bag for manually aiding in the breathing process of a patient during use of the equipment by manual compression and relaxation, and wherein provision is made for the discharging of exhaled gas via a gas removal conduit extending from the breathing bag while being at least couplable to extend to a location of final discharging adequately removed from a location of use of the equipment, once so ready for use, to limit the possibility of exhaled gas contamination of its zone of use, wherein at least part of the gas removal conduit is in the form of an exhaust conduit branching laterally from the gas guiding conduit at a location remote from the breathing piece though gas flow fashion interconnected to discharge exhaled gas that has been exposed to the action of the breathing bag once the equipment is in use along the gas-guiding conduit, as thus accommodating such flow of exhaled gas, and the gas removal conduit in providing conventional conditions of breathing assistance during use of the equipment, characterized in that the breathing bag is conventionally shaped with the gas removal conduit extending from a distal and discharge end (12.2) of the bag as regards its gas guiding conduit connected end (12.1), and in that the gas removal conduit returns in snug adjacent relationship with the breathing bag from its distal end (12.2) by way of an exhaust air discharge bridging conduit forming part of the gas removal conduit to the position of branching of the exhaust conduit from the gas guiding conduit, thereby contributing to facilitate the use of the equipment under conventional conditions of breathing assistance use.