To provide a structure capable of sticking a material to be stuck to the surface of a frame without causing the dispersion of adhesion strength.

The sticking structure of the material to be stuck sticks the material 20 to be stuck to the surface of a frame 1 through an adhesive material 34. Of the surfaces of the frame 1, on the surface to stick the material 20 to be stuck, a recessed part 10 is formed, The adhesive material 34 is attached to the surface to stick the material 20 to be stuck, and the material 20 to be stuck and the frame 1 are relatively pressurized in the attached state and the material 20 to be stuck is stuck to the surface of the frame 1.