To provide a light guide film which takes in sunlight or the like to easily guide it to an arbitrary place.

The light guide film is made of a flexible transparent film and has a light introducing means 2 provided on one side face of a part 11 in the lengthwise direction thereof and has a light emission means 2 provided on one side face of another part 12, and both faces of an intermediate part 13 between the part 11 and another part 12 are made into smooth surfaces, and light introduced from the light introducing means 2 of the part 11 into the transparent film is guided to the light emission means 2 of the another part 12 through the intermediate part 13 and is emitted to the outside by the light emission means 2.