Ostomy device

An ostomy device (2) for attachment (coupling) to a base plate (4) is disclosed. The ostomy device (2) comprises an attachment ring (16) configured for being detachably attached to the base plate (6). The ostomy device (2) further comprises a connecting element (8) comprising one or more engagement portions (24) configured to be detachably attached to corresponding engagement members (22) of the attachment ring (16). The connecting element (8) comprises an opening (44) surrounded by a flange (14). The ostomy device (2) comprises a sealing member (10) configured to be detachably attached to the flange (14) and seal the ostomy device (2) against a collecting element (12) extending through the opening (44) surrounded by the flange (14).