Fuel nozzle of a gas turbine with swirler

The invention relates to a swirler of a fuel nozzle 6 of a gas turbine, with an inner 22 and an outer 21 ring member, the ring elements 21, 22 concentric with each other are disposed between the inner ring member 22 and the outer ring member 21, an outer annular channel 18a is formed , which in its axially central region has a radial height of h, characterized in that the outer ring channel has 18a at its inflow region 23, a radial height H and is provided in the inflow region 23 having air guide elements 11, wherein H is> h, wherein on the radially inner side of the inner ring member (22), an inner annular channel (18b) is formed, which with air guide-provided (11), inflow (23) has a greater radial height than a central portion of the inner annular channel (18b), wherein the outer annular channel (18a) in the region of the guide elements (11) an effective flow area (a) has, that is greater, than the effective flow area in the axial central region of the outer annular channel (18a) without guide elements and the cross section of the outer annular channel (18a) extends from the inflow region (23) to an outflow (24) is tapered.