Abstract: One first aspect of the invention relates to a connection device for the bottom (1) and lid (3) of a box with side-panels (2). The device comprises one or more first attachment means (5) firmly connected to the bottom (1) and lid (3) and one or more attachment means (6) firmly connected to at least one side panel (2). Connection means (7) are also provided for connecting the bottom (1) and lid (3) to the side (panel (2) ny interaction with the attachment means (5, 6). Each connection means (7) consists of a clamp with a resilient body (7.1), a first hook (7.2) being arranged at one end and a second hook (7.3) being arranged at the other end. The first attachment means consists of a first rail (5), arranged along an edge on the bottom (1) and lid (3) respectively, equipped with connection means consisting of one or more slots (5.4). The second attachment means consists of a second rail (6) arranged on a side panel (2) essentially parallel to the edge of the side panel (2). The first hook (7.