Optical film, polarizing plate, and image display device

An optical film comprising:

• a substrate;
• and
• a phase difference layer which is provided on the substrate to be adjacent to the substrate,
• wherein the phase difference layer is a layer formed by fixing vertical alignment of a liquid crystal compound having a polymerizable group included in a liquid crystal composition containing the liquid crystal compound and a polymer compound,
• a difference in δa value between the polymer compound and the substrate, which is calculated using three-dimensional SP values, is 3 or less,
• a content of the polymer compound is less than 10 parts by mass with respect to 100 parts by mass of the liquid crystal compound,
• wherein the polymer compound is a polymer having a repeating unit represented by Formula (I),
• in Formula (I), R1 represents a hydrogen atom or a methyl group;
• X represents —O— or —NH—;
• and R2 represents a hydrogen atom or an organic group;
• the organic group includes a hydrophilic group, and the hydrophilic group is a group selected from the group consisting of a hydroxy group, a carboxy group, an amino group, a sulfo group, a sulfate group, a phosphonoxy group, and salts thereof, and
• wherein the polymer compound does not have a fluorine atom.