Provided is an azole derivative which can be contained as an active ingredient in an agricultural or horticultural chemical agent having an excellent disease control effect. This azole derivative is represented by general formula (I). (In formula (I), R1 represents a C1-C6 alkyl group which may be substituted； R2 represents a functional group containing a carbonyl group, wherein a carbon atom in the carbonyl group is bonded to both a carbon atom substituted by R1 in the cyclopentane ring and any one selected from a hydrogen atom, a hydroxyl group, R3, OR3 and NR3R4； R3 and R4 independently represent a C1-C6 alkyl group, a C2-C6 alkenyl group or a C2-C6 alkynyl group； Y represents a halogen atom, a C1-C4 alkyl group, a C1-C4 haloalkyl group, a C1-C4 alkoxy group, a C1-C4 haloalkoxy group, a phenyl group, a cyano group or a nitro group； m represents 0-5； and A represents a nitrogen atom or a methine group.)
