To provide a closure making a frame member sectioning a glass panel greatly inconspicuous, maintaining a good crime-prevention property, facilitating manufacture, and having good operational performance.

A frame structure for a slide closure, which is openable, comprises a frame of a rectangular shape having four frame members connected to one another at their ends. The frame structure comprises at least one frame member having the first base part holding the glass panel 5 and the second base part housing a slide means near the first base part. The first base part is displaced to an indoor side with respect to the second base part.