The invention provides a tank container. The tank container comprises a tank body, and two end frames positioned at two ends of the tank body; the tank body comprises a cylinder, and seals welded at two ends of the cylinder; the combined places of the cylinder and the seals form connecting welding lines; two ends of the tank body are fixedly connected with the two end frames through two sets of support plates, respectively; and gaps are formed between the support plates and the connecting welding lines of the tank body for avoiding from the connecting welding lines. The connected places of the support plates and the tank body are avoided from the connecting welding lines on the tank body to prevent the fatigue problem caused by stress concentration and to achieve excellent mechanical performance; and as the support plates are lighter in weights, compared with skirt ring connecting and bottom inclined support connecting structures in the prior art, the tank container is lighter by above 150 kg, the self weight of the tank container is effectively reduced, and the loading efficiency is improved.