Liquid crystal aligning agent, liquid crystal alignment film and method for producing same, and liquid crystal element

Provided are: a liquid crystal alignment film which is capable of forming a liquid crystal display element having good contrast even when exposure energy for photo-alignment treatment is low; and a liquid crystal alignment agent which is capable of forming such a liquid crystal alignment film. The invention relates to a liquid crystal aligning agent, which comprises polyamic acid or a derivative thereof obtained by reacting a tetracarboxylic acid derivative with diamines, in the liquid crystal aligning agent, the tetracarboxylic acid derivative comprises a compound represented by a formula (I), and the diamines comprise at least one selected from a group consisting of a formula (DI-13) and a formula (DI-17-1). The group of * 1 and * 1'and the group of * 2 and * 2 'of formula (I) may each be bonded to the same oxygen atom; rb1-Rb4 are independently hydrogen atoms or methyl, and at least one is methyl. In formula (DI-13), R23 represents an alkyl group or the like, and p and q independently represent an integer