Child-proof paper or cardboard container

A paper or cardboard container, comprising:

• a container body comprising a bottom wall, a front wall, a rear wall, and two side walls, wherein the front wall, the rear wall and the side walls have respective upper edges defining an opening opposite to the bottom wall, wherein each of said side walls comprises an outer layer having a through hole, and an inner layer having a through window facing the through hole of the outer layer,
• a lid hinged to the container body along a hinge line extending along an upper side of the rear wall of the container body and movable between an open configuration and a closed configuration, wherein the lid comprises a top wall and a pair of flanks, wherein each of said flanks has an engagement tab folded onto a respective outer surface, wherein in said closed configuration the respective outer surfaces of said flanks are in contact with respective portions of inner surfaces of respective side walls of the container body, and wherein in said closed configuration the engagement tabs of said flanks of the lid engage respective through windows of said side walls of the container body and keep the lid closed on the container body,
• wherein at least one of said flanks of the lid has a rear side that, in the closed configuration of the lid, abuts against the rear wall of the container body and prevents the lid from being pushed inward into the container body beyond a position where the engagement tabs are engaged in their respective through windows.