An object of the present invention is to provide a novel fungicide having an excellent fungicidal activity. The compound used as the fungicide of the present invention is an ethynylphenylamidine compound or a salt thereof, the compound being represented by Formula (1): wherein R 1 and R 2 are each hydrogen or C 1-12 alkyl, or R 1 and R 2 may be bonded together to form C 1-7 alkylene R 3 is hydrogen or C 1-4 alkylthio R 4 , R 5 , R 6 , and R 7 are each hydrogen, halogen, etc. and R 8 is hydrogen, C 1-20 alkyl, C 3-8 cycloalkyl, C 1-4 haloalkyl, phenyl, a heterocyclic group, or -(CH 2 )n-Si(R 9 )(R 10 )(R 11 ) wherein R 9 , R 10 , and R 11 are each C 1-6 alkyl, and n is an integer of 0 or 1.本發明係以提供一種具有優異殺菌活性之新穎藥劑為課題。本發明藥劑之化合物係如通式(1)所示之乙炔基苯基脒化合物或其鹽:[式中,R1及R2分別表示氫原子或C1-12烷基,或者R1及R2亦可互相結合而表示C1-7伸烷基。R3表示氫原子或C1-4烷硫基。R4、R5、R6及R7分別表示氫原子、鹵素原子等。R8表示氫原子、C1-20烷基、C3-8環烷基、C1-4鹵烷基、苯基、雜環基或基-(CH2)n-Si(R9)(R10)(R11)。在此,R9、R10及R11分別表示C1-6烷基,n表示0或1之整數。]。
