An arylamidine compound represented by formula (II) or the like, that is excellent in fungicidal activity and safety, and that can be industrially and advantageously manufactured, and a fungicide or an agent for controlling plant diseases, which contains the arylamidine compound as an active ingredient thereof, are provided. In the formula, G represents a carbon atom or a nitrogen atom； Q represents a single bond, -O-, -S-, -SO-, -SO2-, or - N (R9) -； X and Z each independently represent an alkylene group or the like； Y represents -N (-A-R7) - or the like； W represents a single bond or - N (R9) -； R1 to R6 each independently represent a hydrogen atom, a hydrocarbon group, a heterocyclyl group, or the like； R30 represents a C1-6 alkyl group or the like； and p represents an integer of 0 to 4.本發明提供一種殺菌活性優異、安全性優異、且工業上可有利地合成之式(II)等所表示之芳基脒化合物、以及含有其作為有效成分之殺菌劑或植物病害防治劑。式中，G表示碳原子或氮原子，Q表示單鍵、-O-、-S-、-SO-、-SO2-、或-N(R9)-等，X及Z各自獨立地表示伸烷基(alkylene group)等，Y表示-N(-A-R7)-等，W表示單鍵或-N(R8)-，R1~R6各自獨立地表示氫原子、烴基、雜環基等，R30表示C1~6烷基等，p為0~4中之任一整數。
