Window pane unit, in particular for motor vehicles, including - a pane, a frame, and a decorative strip attachable to the frame that at least partially covers the frame which, along its entire longitudinal extension, has a first profile portion forming a connection with said pane and has a second profile portion adjacent to the first profile portion, - fixing areas spaced apart from each other along a longitudinal extension of the frame for fixing a decorative strip thereon which has a profile portion comprising a decorative surface which at least partially covers the frame and has a profile portion having at least one fastener that may be arranged in the fixing area, - at least one insert that is provided in the fixing area of the frame and is integrally formed with the frame by injection-moulding or is at least partially enclosed by the frame, - a fixing portion which is provided on said insert and connected to the frame, and - a mounting portion which is associated with the fixing area, and at least one plug-through opening for receiving the fastener of the decorative strip, - said insert comprising at least one releasable snap-lock element which is associated with the plug-through opening, - said fastener of the decorative strip positioned in the plug-through opening of the insert being secured against inadvertent release by the releasable snap-lock element, - characterised in that the frame has a reception zone provided therein which leads to the plug-through opening of the mounting portion of the insert for the purpose of receiving and positioning the decorative strip, said reception zone having a wall portion without steps extending from the outside to the plug-through opening with which a corresponding wall surface without steps provided on the profile portion of the decorative strip is associated when said decorative strip is in a fixed position. - a pane, a frame, and a decorative strip attachable to the frame that at least partially covers the frame which, along its entire longitudinal extension, has a first profile portion forming a connection with said pane and has a second profile portion adjacent to the first profile portion, - fixing areas spaced apart from each other along a longitudinal extension of the frame for fixing a decorative strip thereon which has a profile portion comprising a decorative surface which at least partially covers the frame and has a profile portion having at least one fastener that may be arranged in the fixing area, - at least one insert that is provided in the fixing area of the frame and is integrally formed with the frame by injection-moulding or is at least partially enclosed by the frame, - a fixing portion which is provided on said insert and connected to the frame, and - a mounting portion which is associated with the fixing area, and at least one plug-through opening for receiving the fastener of the decorative strip, - said insert comprising at least one releasable snap-lock element which is associated with the plug-through opening, - said fastener of the decorative strip positioned in the plug-through opening of the insert being secured against inadvertent release by the releasable snap-lock element, - characterised in that the frame has a reception zone provided therein which leads to the plug-through opening of the mounting portion of the insert for the purpose of receiving and positioning the decorative strip, said reception zone having a wall portion without steps extending from the outside to the plug-through opening with which a corresponding wall surface without steps provided on the profile portion of the decorative strip is associated when said decorative strip is in a fixed position.