Dermatoscopic images of the most common classes of pigmented skin lesions: Pigmented Actinic Keratoses / Bowen's disease, Basal Cell Carcinoma, Benign Keratoses (Seborrheic Keratosis, Solar Lentigo and Lichen-Planus Like Keratosis), Dermatofibroma, Melanocytic Nevi, Melanoma and Vascular lesions. Images are made available in preparation for the "Human-Against-Machine with 10000 training images" study, and originate mainly from the ViDIR Group (Department of Dermatology, Medical University of Vienna) and a skin cancer office in Australia (School of Medicine, University of Queensland). Data is provided under the CC BY-NC 4.0 license, attribution should be made by referencing the data descriptor manuscript: Tschandl, P., Rosendahl, C. & Kittler, H. The HAM10000 dataset, a large collection of multi-source dermatoscopic images of common pigmented skin lesions. Sci. Data 5, 180161 doi:10.1038/sdata.2018.161 (2018).