The invention relates to a frame (1) for cable feedthrough systems. The frame (1) has a first frame part (10, 30) and a second frame part (10′, 30′), wherein each frame part (10, 10′, 30, 30′) has a recess (19, 19′, 39, 39′) and a projection (18, 18′, 38, 38′). The projection (18; 38) of the first frame part (10, 30) is suitably embodied for being inserted into the recess (19′, 39′) of the second frame part (10′; 30′), and the projection (18′, 38′) of the second frame part (10′, 30′) is suitably embodied for being inserted into the recess (19, 39) of the first frame part (10, 30). The first frame part (10, 30) further has a locking member (11, 31), and the second frame part (10′, 30′) further has a locking member (11′, 31′), wherein the locking members (11, 11′, 31, 31′) in the assembled state may detachably connect the first frame part (10, 30) with the second frame part (10′, 30′), wherein the locking members (31, 31′) have latch fasteners, or wherein the locking members (11, 11′) have sliding members. Furthermore, the invention also provides frame parts (10, 10′; 30, 30′).