Liquid crystal-aligning agent, and method for production of liquid crystal alignment film

Disclosed is a liquid crystal-aligning agent comprising at least one polymer selected from the group consisting of a polyamic acid produced by reacting a tetracarboxylic acid dianhydride with a diamine compound including specific compounds typified by a compound represented by the formula (1-1), and a polyimide produced by imidizing the polyamic acid. Wherein R1 represents an alkyl group having 1 to 20 carbon atoms or an alicyclic group having 5 to 50 carbon atoms; and b represents an integer of 0 to 20. The liquid crystal-aligning agent enables to produce a liquid crystal alignment film having good aligning properties and excellent seizing properties by a photo-alignment method at a lower irradiance level.