To provide a hinge structure which takes a larger rotation range for lifting or pushing and opening an opening/closing body as compared with a movement amount in the axial direction of an operation button.

In a hinge structure including a body 2 and an opening/closing body 4 and equipped with a support shaft 31 rotatably connecting the body and the opening/closing body to each other and a swing support mechanism Y for the opening/closing body, a lever cam 40 is incorporated into the body and an operation button 50 is provided so as to be friction-engaged with the lever cam. When opening the opening/closing body, the operation button is pushed in the axial direction of the support shaft against a spring force of a return spring 51 for the operation button, and thereby, the lever cam is rotated by a required amount while pressing the inner surface of the opening/closing body by a contact part and against a return force of the swing support mechanism for the opening/closing body by friction engagement between a pressing part of the operation button and a receiving surface of the lever cam. After the rotation of the opening/closing body by required amount, the opening/closing body is automatically rotated up to a full open range by a torque of the swing support mechanism for the opening/closing body.