The present invention provides an antifungal agent having an excellent antifungal action and excellent in physical properties, in particular, solubility in water and safety. According to the present invention, a compound represented by the following formula (I) or a salt thereof: [wherein R1 is a hydrogen atom, a halogen atom, an amino group, R11-NH- (R11 is a C1-6 alkyl group, A hydroxy C1-6 alkyl group, a C1-6 alkoxy C1-6 alkyl group, or a C1-6 alkoxycarbonyl C1-6 alkyl group.), R12- (CO) -NH- (R12 is a C1-6 alkyl group) Group or C1-6 alkoxy C1-6 alkyl group), C1-6 alkyl group, hydroxy C1-6 alkyl group, cyano C1-6 alkyl group, C1-6 alkoxy group, or C1-6 alkoxy C1-6 alkyl group R2 represents a group represented by the formula (II)； one of X and Y represents a nitrogen atom, the other represents a nitrogen atom or an oxygen atom； ring A represents a halogen atom or C1- 5- or 6-membered heteroaryl optionally having 1 or 2 alkyl groups Z represents a single bond, a methylene group, an ethylene group, an oxygen atom, a sulfur atom, —CH 2 O—, —OCH 2 —, —NH—, —CH 2 NH—, —NHCH 2 —, —CH 2 S—, Or —SCH 2 —； R 3 may have a hydrogen atom, a halogen atom, or one or two substituents each selected from substituent group α, C 1-6 alkyl group, C 3- 8 means a cycloalkyl group, a C6-10 aryl group, a 5 or 6 membered heteroaryl group, or a 5 or 6 membered non-aromatic heterocyclic group； R4 means a hydrogen atom or a halogen atom； R represents a hydrogen atom or a C1-6 alkyl group which may be substituted with a dimethylamino group. [Substituent group α] Halogen atom, cyano group, C1-6 alkyl group, C1-6 alkoxy group, C1-6 alkoxycarbonyl group, C3-8 cycloalkyl group, C2-6 alkenyl group, and C2-6 alkynyl group . ] Is disclosed. [Chemical 1]本発明は、優れた抗真菌作用を有し、物性、特に、水への溶解性、及び安全性の面でも優れた抗真菌剤を提供する。本発明によれば、下式（I）で表される化合物又はその塩；［式中、Ｒ1が、水素原子、ハロゲン原子、アミノ基、Ｒ11－ＮＨ－（Ｒ11が、Ｃ1-6アルキル基、ヒドロキシＣ1-6アルキル基、Ｃ1-6アルコキシＣ1-6アルキル基、又はＣ1-6アルコキシカルボニルＣ1-6アルキル基を意味する。）、Ｒ12－（ＣＯ）－ＮＨ－（Ｒ12が、Ｃ1-6アルキル基又はＣ1-6アルコキシＣ1-6アルキル基）、Ｃ1-6アルキル基
