A structural element, in particular a furniture element, comprising: a connection member that has an arm; and a frame element for attachment to a front face of the arm of the connection member, wherein the frame element has at least one cutout at a resting surface for engaging a fixing means to establish a releasable connection to the connection member; wherein a connection means is present in the arm of the connection member to establish a releasable connection to the frame element by an engagement into the cutout of the frame element; the connection means has two elements which engage into the cutout of the frame element and of which at least one has a cutout, in particular a peripheral groove, that is configured to cooperate with the fixing means to lock the connection member to the frame element; and/or the connection means is mechanically drivable and extends a fixing means on actuation, characterized in that the frame element substantially has a U-shaped basic structure and is connected to a respective one of the connection members at the front sides of the two limbs of the U-shaped basic structure, with the structural element furthermore comprising a hollow space in a preferably vertically oriented section of the frame element that is accessible from the outside via a partial groove in the frame element; with a slot nut being attached in this hollow space that has a threaded bore, and with the slot nut being arranged in the interior of the hollow space; and with the slot nut being connectable to an adapter element, preferably via a screw, that is pushed through the adapter element and has an external thread matching the threaded bore of the slot nut. a connection member that has an arm; and a frame element for attachment to a front face of the arm of the connection member, wherein the frame element has at least one cutout at a resting surface for engaging a fixing means to establish a releasable connection to the connection member; wherein a connection means is present in the arm of the connection member to establish a releasable connection to the frame element by an engagement into the cutout of the frame element; the connection means has two elements which engage into the cutout of the frame element and of which at least one has a cutout, in particular a peripheral groove, that is configured to cooperate with the fixing means to lock the connection member to the frame element; and/or the connection means is mechanically drivable and extends a fixing means on actuation, characterized in that the frame element substantially has a U-shaped basic structure and is connected to a respective one of the connection members at the front sides of the two limbs of the U-shaped basic structure, with the structural element furthermore comprising a hollow space in a preferably vertically oriented section of the frame element that is accessible from the outside via a partial groove in the frame element; with a slot nut being attached in this hollow space that has a threaded bore, and with the slot nut being arranged in the interior of the hollow space; and with the slot nut being connectable to an adapter element, preferably via a screw, that is pushed through the adapter element and has an external thread matching the threaded bore of the slot nut.