<p>A seal structure having an excellent sealing performance and capable of reducing a width of a seal portion as much as possible with preventing the seal portion from being broken away is provided. The seal structure for sealing between two members in a fluid-tight or an air-tight manner is structured such that the seal portion is formed in at least one of joint surfaces of the two members by continuously printing along a seal portion of the joint portions and that a recess portion or a groove (10) is formed at a middle portion of the seal portion in a width direction. <IMAGE></p>
