Abstract: The present invention provides heterocyclic compounds or salts thereof having excellent pest control effects, pest control agents containing the same as active ingredients, and production intermediates thereof. The present invention provides heterocyclic compounds represented by the general formula [I] (wherein, R1 represents a hydrogen atom, cyano group, or C1-C7 acyl group which is unsubstituted or substituted with a halogen atom, R2 represents a C1-C6 alkyl group, etc., each of A1 and A2 independently represents a nitrogen atom, CH or bond, either W1 or W2 represents a nitrogen atom, and the other represents a carbon atom, each of A3, A4, A5, A6, A7, A8, and A9 independently represents a nitrogen atom or a carbon atom substituted with R3, R4, R5, R6, R7, R8, and R9, respectively, each of R3, R4, R5, R6, R7, R8, and R9 represents hydrogen atoms, C1-C6 haloalkyl groups, etc., R10 represents a hydrogen atom, C1-C12 alkyl group, C1-C6 alkoxy C1-C6 alkyl group, C1-C12 haloalkyl group, etc.