<;P>;PROBLEM TO BE SOLVED: To provide a plant disease controlling agent which exhibits an excellent controlling effect against seed infectious diseases and soil infectious diseases occurring on raising rice seedlings and diseases of agricultural and horticultural crops with the use of a novel microorganism having broad antagonism and has a reduced environmental load, and a controlling method. <;P>;SOLUTION: The plant disease controlling agent includes AB5194 strain (FERM, P-21726) of Penicillium sp. having plant disease controllability as an active ingredient. <;P>;COPYRIGHT: (C)2011,JPO&INPIT