A fitting arrangement for the leaf of a window, of a door or the like, said fitting arrangement comprising - a pivot arm which is configured to be fastened to the leaf and which has, at a hinge-side end of its longitudinal extent, a stay support having a leg angled transversely to the longitudinal extent, and - a support band which is configured to be pivotably supported with a bearing section at a pivot bearing, which is to be provided at the frame of the window or of the door, about an axis of rotation of the pivot bearing and which has a coupling section which can be coupled to the angled leg of the stay support of the pivot arm by means of a bayonet fastening, wherein the bayonet fastening comprises a bayonet pin extending along a pin axis and a bayonet receiver, said bayonet pin and bayonet receiver being configured such that, in order to close the bayonet fastening, the bayonet pin is axially plugged into the bayonet receiver with respect to the pin axis and is subsequently rotated relative to the bayonet receiver about the pin axis into a coupling position in which form-fitting means of the bayonet pin engage behind corresponding form-fitting means of the bayonet receiver and thereby block the bayonet pin against axially exiting from the bayonet receiver, wherein the bayonet pin is rigidly, in particularly rotationally fixedly, arranged at the stay support or at the support band, wherein the stay support has a latch projection (37, 37') projecting in parallel with the pin axis and the support band has a corresponding latch recess (39, 39') or, conversely, the support band has the latch projection (37, 37') and the stay support has the latch recess (39, 39'), and wherein the latch projection (37, 37') and the latch recess (39, 39') are arranged such that the latch projection (37, 37') engages, preferably axially, into the latch recess (39, 39') in the coupling position of the bayonet pin, characterized in that a run-on chamfer (41, 41') is formed at the support band or at the stay support and is arranged such that, when rotating the bayonet pin into the coupling position, the latch projection (37, 37') runs up against the run-on chamfer (41, 41') and is thereby pushed back axially with respect to the pin axis, or in that the latch recess (39, 39') is perforated in a radial direction with respect to the pin axis, wherein a run-on contour (55, 55') is formed at the support band or at the stay support and is arranged such that, when rotating the bayonet pin into the coupling position, the latch projection (37, 37') runs up against the run-on contour (55, 55') and is thereby pushed back radially with respect to the pin axis. - a pivot arm which is configured to be fastened to the leaf and which has, at a hinge-side end of its longitudinal extent, a stay support having a leg angled transversely to the longitudinal extent, and - a support band which is configured to be pivotably supported with a bearing section at a pivot bearing, which is to be provided at the frame of the window or of the door, about an axis of rotation of the pivot bearing and which has a coupling section which can be coupled to the angled leg of the stay support of the pivot arm by means of a bayonet fastening, wherein the bayonet fastening comprises a bayonet pin extending along a pin axis and a bayonet receiver, said bayonet pin and bayonet receiver being configured such that, in order to close the bayonet fastening, the bayonet pin is axially plugged into the bayonet receiver with respect to the pin axis and is subsequently rotated relative to the bayonet receiver about the pin axis into a coupling position in which form-fitting means of the bayonet pin engage behind corresponding form-fitting means of the bayonet receiver and thereby block the bayonet pin against axially exiting from the bayonet receiver, wherein the bayonet pin is rigidly, in particularly rotationally fixedly, arranged at the stay support or at the support band, wherein the stay support has a latch projection (37, 37') projecting in parallel with the pin axis and the support band has a corresponding latch recess (39, 39') or, conversely, the support band has the latch projection (37, 37') and the stay support has the latch recess (39, 39'), and wherein the latch projection (37, 37') and the latch recess (39, 39') are arranged such that the latch projection (37, 37') engages, preferably axially, into the latch recess (39, 39') in the coupling position of the bayonet pin, characterized in that a run-on chamfer (41, 41') is formed at the support band or at the stay support and is arranged such that, when rotating the bayonet pin into the coupling position, the latch projection (37, 37') runs up against the run-on chamfer (41, 41') and is thereby pushed back axially with respect to the pin axis, or in that the latch recess (39, 39') is perforated in a radial direction with respect to the pin axis, wherein a run-on contour (55, 55') is formed at the support band or at the stay support and is arranged such that, when rotating the bayonet pin into the coupling position, the latch projection (37, 37') runs up against the run-on contour (55, 55') and is thereby pushed back radially with respect to the pin axis.