To prevent a pressurizing operation by an airplane cabin and achieve a large space feeling while concealing an actual dimension regardless of a small window size of an outside window and a large structure depth of a window funnel, in the case of a cabin window for passenger cabin especially in a passenger airplane that includes an outer plate and an inner plate, a space between the plates, and a frame in a peripheral edge region in the space between the plates.

A layer for reflecting light is provided in a visible region in at least the space between the plates in the frame of the cabin window.