Linear immunoglobulin (Ig) A dermatosis (LAD) is an acquired, autoimmune vesiculobullous dermatosis characterized by subepidermal blisters with deposition of linear homogeneous IgA along the dermoepidermal junction (DEJ). Its associations with malignancies, drugs, inflammatory diseases such as ulcerative colitis, IgA nephropathy, and Hashimoto thyroiditis have been reported respectively. Herein, we report a rare case of concurrent LAD, Hashimoto thyroiditis, and IgA nephropathy. A 45-year-old woman presented with a 5-week history of vesicular eruption over her body. Four years prior, she was diagnosed with Hashimoto thyroiditis. In addition, she had been taking telmisartan 80 mg, amlodipine 5 mg, and hydrochlorothiazide 1,2.5 mg a day for 4 months to control hypertension. Physical examination revealed multiple erythematous collarettes of blisters with intense pruritus on her whole body. Skin biopsy showed a subepidermal bulla with mixed inflammatory infiltration in the upper dermis and the direct immunofluorescence study revealed linear deposition of IgA along the DEJ, resulting in the diagnosis of LAD. Laboratory test results revealed high serum creatinine level, proteinuria, and hematuria. On referral to the department of nephrology, she was diagnosed with IgA nephropathy by kidney biopsy. During 1-year follow-up, the cutaneous lesions had been fairly well controlled with dapsone 50∼100 mg/day, with or without colchicine 1.2 mg/day.