<p>A film for an illuminated signboard is described. The film is a semi-transparent film made of a stretched resin film containing a finely divided powder of a white inorganic material. The semi-transparent film satisfies the following requirements (1) to (4): (1) an opacity of from 40 % to 70 %; (2) a whiteness of from 80 % to 100 %; (3) a total light beam average reflectance of from 30 % to 60 %; and (4) a total light beam average transmittance of from 30 % to 70 %. <MATH></p>