Abstract: A premixing burner intended to be mounted in a combustion chamber, the burner being configured to be supplied with oxidant and with fuel, the burner comprising a central annular shroud and a peripheral annular shroud, the central shroud being positioned inside the peripheral shroud so as to form an annular space between these central and peripheral shrouds, the burner further comprising at least one injection of fuel and at least one injection of oxidant into the annular space so as to premix the fuel and the oxidant in the annular space.