PROBLEM TO BE SOLVED: To provide a fungicidal composition for wood, which is effective against a wide range of fungi against which sufficient effects could not have been obtained by the combinations of conventional chemicals, and to provide a method for preventing fungi of wood with the composition.SOLUTION: This fungicidal composition for wood is characterized by comprising at least one of iminoctadine or its salts, and at least one antimicrobial compound selected from the group consisting of azole-based compounds, isothiazoline-based compounds, imidazole-based compounds, pyridine-based compounds, iodine-based compounds, thiocyanate-based compounds, and quaternary ammonium salt compounds. The method for preventing fungi of wood is characterized by using the fungicidal composition for wood.COPYRIGHT: (C)2008,JPO&INPIT【課題】従来の薬剤の組み合わせでは十分な効果が得られなかった広範囲のカビ類に有効な木材用防カビ組成物、およびこの組成物を用いる木材の防カビ方法を提供する。【解決手段】イミノクタジンまたはその塩の少なくとも1種と、アゾール系化合物、イソチアゾリン系化合物、イミダゾール系化合物、ピリジン系化合物、ヨード系化合物、チオシアネート系化合物、および4級アンモニウム塩化合物からなる群から選ばれた少なくとも1種の殺菌性化合物とを含有することを特徴とする木材用防カビ組成物、この木材用防カビ組成物を用いることを特徴とする木材の防カビ方法。【選択図】 なし。