Abstract: A door structure for coke oven is disclosed which includes at least two locking head rails and having a door body which is continuously made of a flexible and elastic material. According to this invention, the material of the door body and the sealing membrane or its compression elements are dimensioned such that ratio of the rigidity of the door body to the specific contact pressure of the sealing membrane is so small that the thermal deformation of the body is compensated mainly by the combined locking forces exerted by the head rails and by the contact forces exerted by the sealing strip.