Closure device comprising a base (100) and a lid (200) articulated by a hinge (205) comprising at least one opening indicator (207) allowing the user to know that a container has been opened at least once. Prior to the first opening, the opening indicator (207) is attached to the lid (200) by at least one separable connector (208), said separable connector (208) being broken on the opening of the container. The base (100) further comprises at least one housing (111) that receives the opening indicator (207) after its separation and shows it to the user through at least one window (112).