The invention relates to a device (10) for reducing the retraction of the margins of an opened fascia of a patient having an open soft-tissue defect, wherein the device (10) has a holding element (11) which, at a first distance from the patient (1), can be fixed with respect to the patient (1), and an attachment element (12) with a multiplicity of attachment points (13) which are configured for the attachment of tensioning means (14) which are connectable to a margin of the fascia (4), wherein the attachment element (12) is connected to the holding element (11) in such a way that it is arranged at a second distance from the patient (1) which is shorter than the first distance, wherein the attachment element (12) is connected to the holding element (11) via precisely one tensile force transmission element (15). The invention further relates to a kit for treating an open soft-tissue defect, having at least one sponge (25) for filling out the soft-tissue defect, and having such a device (10) for reducing the retraction of the margins of an opened fascia (4).
