A method for producing a light control panel includes a first step of forming a block 19 in which transparent sheets 16 of glass, ceramic or transparent plastic and mirror sheets 17 each having a metallic reflective surface on one side or both sides are alternately stacked and laminated, and a second step of forming a first light control panel 13 and a second light control panel 14 to be stacked with planar light-reflective portions 11, 12 of each of the first and the second light control panels 13, 14 in a crossed state, the first and the second light control panels 13, 14 being arranged opposed to each other, by cutting out from the block 19 on a surface crossing the transparent sheets 16 and the mirror sheets 17 in a manner that makes the thickness of a cutout constant.