A handle structure includes a holding member, a press member, and a hook. The holding member includes a holding portion and a space formed in the holding portion. The press member includes a press portion and a plurality of adjustment holes. The press portion is movably disposed in the space. The adjustment holes are disposed on the other end of the press member opposite to the press portion. The hook includes a clasp portion and at least one fastening hole. The fastening hole is adjustably positioned corresponding to any of the adjustment holes, and the clasp portion is movable along with the movement of the press portion, wherein the clasp portion protrudes out of the holding member. The hook moves by pressing the press portion.