PURPOSE: To eliminate the trouble of adjusting a focus by providing a positioning surface, which can be made to contact with the picture surface of a film, at a device fixing part equipped with a slide film.

CONSTITUTION: The pressing device is provided which brings the picture surface of film (b) of slide film B into contact with positioning surface 52. This pressing device has sliding frame 54 slid toward holder 50 by the manual operation lever. This sliding frame 54 holds set glass 57 activated elastically in the projecting direction by compressing springs 56 set around support pins 55. This set glass 57 has set surface 58 in parallel to positioning surface 52. In such a constitution, sliding frame 54 is slid after slide film B is loaded in holder 50, so that the picture surface of film (b) will come into contact with positioning surface 52. Therefore, the need for focus adjusting operation is eliminated by previously adjusting the position of positioning surface 52 to the focus position.