Minimal deviation melanomas (MDM) are melanocytic tumours that were more atypical than ordinary nevi but less atypical than conventional melanomas. Histologically they are expansive growth of atypical melanocytes with expansion into the reticular layer of the dermis (Clark level IV). Seventy years old man, applied our clinic for a mass on his left heel. On examination, a 2x2 cm size, brown solid mass that has ulceration on surface was visible on inferior of left medial malleol. The mass was excised with a 1 cm margin and defect was reconstructed by skin grafts. After pathological examination that mass was explained as MDM. MDM’s hold on a point between benign nevus and the typical, biologically aggressive malignant melanoma. The metastatic potential of MDM is lower than malign melanoma. Most of the initial reports recommended a “less aggressive” form of therapy for MDM because of their more favourable outcome.