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Occlusive dressing is widely accepted and used to manage skin ulcers. However, with respect to its application to incisional wounds, most studies have been conducted about the clinical effects on incisional healing of surgical sites. Studies of the histological effects of occlusive dressing for incisional wounds have been few. The aim of this study was to clarify the histological effects of occlusive dressings on healing of incisional skin wounds. Rat dorsal skin was incised down to the panniculus and sutured immediately. Dressing types included 2-octyl cyanoacrylate and hydrocolloid materials as occlusive dressings and no-dressing as the open therapy. Histological examination and dermoscopic observation were performed 1, 2, 4 and 7 days after surgery. The findings from each dressing type were compared. In the open therapy group, the upper portion of the edge of incision was necrosed minimally and finally healed with wide scar formation. However, in the occlusive dressing groups, micronecrosis of the incision edge seen in the no-dressing group was not observed, healing was more rapid and the remaining scar was finer. Occlusive dressing can prevent micronecrosis of the incision edge, resulting in rapid and excellent healing. This study shows that the efficacy of and supports the use of occlusive dressing in incisional wound management.