An azolylmethylidenehydrazine derivative represented by the formula (I)wherein Ar is an aryl group optionally having substituent(s), a heteroaryl group optionally having substituent(s) or a heteroaryl group optionally having substituent(s),R1 and R2 are the same or different and each is an alkyl group, a cycloalkyl group, an aralkyl group optionally having substituent(s), an aryl group optionally having substituent(s), a heteroarylalkyl group optionally having substituent(s), or R1 and R2 are bonded to each other to form a nitrogen-containing heterocyclic group optionally having substituent(s), and X is CH or a nitrogen atom,or a pharmacologically acceptable salt thereof is useful as a medicament, particularly as an antifungal agent, or an anti-inflammatory agent or an antiallergic agent.
