The present invention is related to a drum (1), used in washing machines, preferably laundry machines, into which laundry to be washed is to be placed, capable of performing washing by rotational movement around its central axis, preferably made of plastic, comprising a main body (2) and a rear cover (3), whereby said rear cover (3) comprises a circular edge (10) which surrounds the main body (2) and the main body (2) comprises an edge socket (14) in which the rear cover edge is located, the main body (2) and the rear cover (3) being connected to each other without forming any protrusion on the outer face of the drum (1).