There is provided a polarizing plate protective film comprising a substrate film, and a layer formed by curing a curable composition containing, setting a total solid content of the curable composition to 100 mass %, from 50 to 90 mass % of the following (A) and from 10 to 40 mass % of the following (B) based on the total solid content, (A) a compound having three or more ethylenically unsaturated double bonds in the molecule, and (B) a rosin compound having an acid value of 150 to 400 mgKOH/g.