The present invention provides an agricultural and horticultural fungicidal composition containing at least one compound A selected from the group consisting of compounds represented by formula (1) {in formula (1), X each independently represents a halogeno group or a C1-6 alkyl group； n represents the number of X, and is an integer of 0-5； X' represents a halogeno group； R1, R2, and R3 each independently represents a C1-6 alkyl group, a C1-6 alkoxy group, or a hydroxyl group； and A1 and A2 each independently represents a nitrogen atom or a carbon atom.}, etc., and at least one compound B selected from the group consisting of pydiflumetofen, pyraziflumid, isofetamid, tolprocarb, fluxametamide, broflanilide, tiadinil, fenoxanil, triflumezopyrim, etc.
