An imine compound represented by the formula: wherein A represents a heterocyclic group; R1, R2, an R3 each represent a hydrogen atom, a halogen atom, a C1-10 alkyl group optionally substituted with an aryl group(s) substituted with a halogen atom(s), a C3-10 cycloalkyl group, a C1-6 haloalkyl group, a C1-10 alkoxy group, etc.; R4 represents an optionally substituted C1-10 alkyl, C2-6 alkenyl, or aryl group; R5 represents a hydrogen atom, a C1-10 alkoxy group, a C1-6 haloalkyl group, an optionally substituted C1-10 alkyl or C2-6 alkenyl group, an optionally substituted aryl or heterocyclic group, etc.; W represents —CO—, —CO—CO—, —CO—NH—, —CS—NH—, or —SO2—, or a cannabinoid-receptor agonist comprising said imine compound as an active ingredient. The imine compound of the present invention has a cannabinoid-receptor agonist effect, and is useful as a therapeutic or prophylactic drug for pains and autoimmune diseases.