The present invention relates to a security window (1) or door in a burglar-retardant embodiment according to the preamble of claim 1. In order to obtain the burglar-retardant properties in the tilted position (7), at least one connecting rod block (15, 15′, 15″) is situated on at least one casement leg (F1 through F4), which prevents a displacement of the assigned section (13.1 through 13.4) of the connecting rod (11) when the casement (3) is in the tilted position (7) or solely allows a displacement path which is required in the closed position (5) of the casement (3) to disengage the scissor hinge (8) and a bearing element (9, 9′) on the casement (3) or the frame (2).