A packaging bag contains a lens-fitted photo film unit in a pillow-type package. Optically transparent window sections are provided on front top and bottom portions of the packaging bag. And a belt-like shaped lightproof section is provided in a center portion of the window section. The window section is made translucent by printing a half-tone dot meshing with a white coating, so that the lens-fitted photo film unit is observable through the window section. The lightproof section is printed with a lightproof coating and covers the front of the taking lens. Opaque coating is printed on an opaque section, which is a portion except the window section and the lightproof section.